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+![](https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcT62gxSPP7isA7BEncc_4ZyUxYKsVKbV8ruG3_L9Chk3yKHEZ9y)
+# **Programming for Problem Solving**
+## **Name** - Naman Marria
+## **CRN -1915369**
+## **Branch - CSE-C2**
+## **Submitted to:- Ms Goldendeep Kaur **
+---
+
+### 1) To print name.
+```C
+      /* Program to print your name */
+
+#include<stdio.h>
+int main() {
+
+puts("***************");
+puts("Naman Marria");
+puts("***************");
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/ypHqS9z.jpg">
+
+### 2) To print College address.
+```C
+        /* College Address */
+ 
+#include<stdio.h>
+int main() {
+
+printf("\n\t\t\tGuru Nanak Dev Engineering College,");
+printf("\n\t\t\tGill Road,");
+printf("\n\t\t\tLudhiana , Punjab\n");
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/bhEApPD.jpg">
+
+### 3) Program to add two integers.
+```C
+     /* To add two integers */
+
+#include <stdio.h>
+int main() {
+    
+int a,b;
+
+printf("\nEnter the numbers....");
+
+printf("\nA:");
+scanf("%d",&a);
+
+printf("\nB:");
+scanf("%d",&b);
+
+a=a+b;
+
+printf("\n Sum of the number is %d ",a);
+
+return 0;
+
+}
+```
+<img src="https://i.imgur.com/4DdtQBP.jpg">
+
+### 4) Program to find quotient and remainder.
+```C
+    /* To find quotient and remainder */
+
+#include <stdio.h>
+
+int main() {
+    
+int a,b,r,q;
+
+printf("\nEnter the Dividend:");
+scanf("%d",&a);
+
+printf("\nEnter the divisor:");
+scanf("%d",&b);
+
+r=a%b;
+q=a/b;
+
+printf("\nRemainder: %d",r);
+printf("\nQuotient: %d",q);
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/0W6jXQU.png">
+
+
+### 5) Program to swap two variables without 3rd variable.
+```C
+    /* Swapping without 3rd variable  */
+
+#include <stdio.h>
+int main() {
+    
+int a,b;
+
+printf("\nEnter the value of A:");
+scanf("%d",&a);
+
+printf("\nEnter the value of B:");
+scanf("%d",&b);
+
+   a = a + b;
+   b = a - b;
+   a = a - b;
+   
+printf("\nA: %d",a);
+printf("\nB: %d",b);
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/k8DDgWr.png">
+
+### 6) Program to check even odd number.
+```C
+/* To find whether number is even or odd */
+
+#include<stdio.h>                                                            int main()
+{
+        int x;
+        printf("enter an integer \n");                                       
+        scanf("%d",&x);
+        if(x%2==0)                                                           
+        printf("even\n");
+        else                                                                 
+        printf("odd\n");
+
+        return 0;
+}
+
+```
+<img src="https://i.imgur.com/cZ6XARD.png">
+
+### 7) Finding greteast of two numbers.
+```C
+     /* Largest one in two */
+
+#include<stdio.h>
+int main()
+{
+        int a,b;
+                printf("enter the two integers a and b respectively \n");
+                scanf("%d%d",&a,&b);
+
+        if(a==b)
+                printf("Both  the numbers are equal\n");
+        else
+                {
+                        if(a>b)
+                        printf("a is greater than b\n",a);
+                        else
+                        printf("b is greater than a\n",b);
+                }
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/jp4XnM9.png">
+
+### 8) Find greatest of three number .
+```C
+/* Largest of three number */
+
+#include<stdio.h>
+int main()
+{
+        int x,y,z;
+        printf("enter the 3 integers -a,b,c respectively \n");
+        scanf("%d%d%d",&x,&y,&z);
+        if(x>y && x>z)
+        printf("a is the greatest number \n",x);
+        else
+                {                                                            
+                        if(y>x && y>z)
+                        printf("b is the greatest number \n",y);             
+                        else
+                        printf("c is the greatest number \n",z);             
+                }
+return 0;                                                                    
+               
+
+```
+<img src="https://i.imgur.com/AZ9vB3V.png">
+
+### 9) Program to assign grade to student according to percentage.
+```C
+/* To find grade of a student by marks */
+
+#include<stdio.h>
+int main() { 
+    
+  int s1,s2,s3,s4,s5,agg;
+  float perc;
+
+  printf("Enter the Marks in 5 Subjects Respectively:\n");
+
+scanf("%d%d%d%d%d",&s1,&s2,&s3,&s4,&s5);
+
+agg=s1+s2+s3+s4+s5; // Aggregate Marks
+  
+  perc=agg/500.0*100;  // Perc Marks
+
+  if(perc>=90)
+  {
+      printf("\nA");
+      
+  }
+  
+  else if (perc>=80 && perc<90)
+  { 
+      printf("\nB");
+      
+  }
+  
+  else if(perc>=70 && perc<80)
+  {
+      printf("\nC");
+      
+  }
+  
+  else if(perc>=60 && perc<70)
+  { 
+      printf("\nD");
+  }
+  else if(perc>=50 && perc<60)
+  {
+      printf("\nE");
+  }
+  else 
+     {
+          printf("\nScope of Improvement....");
+    } 
+    return 0;
+}
+```
+<img src="https://i.imgur.com/ssrLTTz.png">
+
+### 10) Program to print roots of quadratic equation.
+```C
+/*Program to print roots */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+ 
+int main() {
+    float a, b, c, root1, root2;
+    float realp, imagp, disc;
+ 
+printf("Enter the values of a, b and c \n");
+    scanf("%f %f %f", &a, &b, &c);
+    
+/* If a = 0, it is not a quadratic equation */
+
+if (a == 0 || b == 0 || c == 0)
+    {
+        printf("Error: Roots cannot be determined \n");
+        exit(1);
+    }
+    else
+    {
+        disc = b * b - 4.0 * a * c;
+        if (disc < 0)
+        {
+            printf("Imaginary Roots\n");
+            realp = -b / (2.0 * a) ;
+            imagp = sqrt(abs(disc)) / (2.0 * a);
+            printf("Root1 = %f  +i %f\n", realp, imagp);
+            printf("Root2 = %f  -i %f\n", realp, imagp);
+        }
+
+else if (disc == 0)
+        {
+            printf("Roots are real and equal\n");
+            root1 = -b / (2.0 * a);
+            root2 = root1;
+            printf("Root1 = %f\n", root1);
+            printf("Root2 = %f\n", root2);
+        }
+
+else if (disc > 0 )
+        {
+            printf("Roots are real and distinct \n");
+            root1 =(-b + sqrt(disc)) / (2.0 * a);
+            root2 =(-b - sqrt(disc)) / (2.0 * a);
+            printf("Root1 = %f  \n", root1);
+            printf("Root2 = %f  \n", root2);
+        }
+
+}
+   return 0;
+}
+
+```
+<img src="https://i.imgur.com/dPqG2D0.png">
+
+### 11) Program to check year is leap or not.
+```C
+/* To find whether year is leap or not */
+
+#include<stdio.h>
+int main()
+{
+        int year;
+printf("enter a year :");
+scanf("%d",&year);
+        if(year%4==0)
+        {       if(year%100==0)
+                        {
+                                if(year%400==0)
+                                printf("%d is a leap year\n",year);
+
+                                else
+                                 printf("%d is not a leap year\n",year);
+
+                        }
+                else
+                printf("%d is a leap year\n",year);
+
+                 }
+          else
+                printf("%d is not a leap year .\n",year);
+
+        return 0;       
+}                       
+                
+```
+<img src="https://i.imgur.com/HUAMcCB.png">
+
+### 12) Program to print table of 5.
+```C
+/* Table of 5 */
+
+#include<stdio.h>
+
+int main() { int res;
+
+for(int i=1;i<=10;i++) {
+
+res=5*i;
+    
+   printf("\n5*%d=%d",i,res);
+   }
+
+   return 0;
+}
+```
+<img src="https://i.imgur.com/tsPglL3.png">
+
+### 13) To make simple calculator using switch case.
+```C
+/* C Program to Create Simple Calculator using Switch Case */
+ 
+#include <stdio.h>
+ 
+int main() {
+	char Operator;
+	float num1, num2, result = 0;
+	
+printf("\n Please Enter an Operator (+, -, *, /)  :  ");
+scanf("%c", &Operator);
+  	
+printf("\n Please Enter the Values for two Operands: num1 and num2  :  ");
+scanf("%f%f", &num1, &num2);
+  	
+switch(Operator)
+  	{
+  		case '+':
+  			result = num1 + num2;
+  			break;
+  		case '-':
+  			result = num1 - num2;
+  			break;
+  		case '*':
+  			result = num1 * num2;
+  			break;
+  		case '/':
+  			result = num1 / num2;
+  			break;
+		default:
+			printf("\n You have enetered an Invalid Operator ");				    			
+	}
+  
+printf("\n The result of %.2f %c %.2f  = %.2f \n", num1, Operator, num2, result);
+	
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/nh6QlRj.png">
+
+### 14) To calculate reverse of a number.
+```C
+/* To find reverse of a Number*/
+
+#include<stdio.h>
+int main() { 
+
+  int num,rev=0;
+
+  printf("\nEnter the Number:");
+  scanf("%ld",&num);
+
+while(num!=0)
+{ 
+    rev = rev * 10;
+    rev = rev + num%10;
+    num = num/10;
+  }
+  
+
+  printf("\nReversed number:%d",rev);
+
+  printf("\n\n");
+  return 0;
+}
+
+
+```
+<img src="https://i.imgur.com/bcLhcLk.png">
+
+### 15) To check whether number is palindrome or not.
+```C
+/* Palindrome */
+
+#include<stdio.h>
+int main()
+{
+        int n , reversedinteger =0,remainder,originalinteger;
+        printf("enter an integer ");
+        scanf("%d",&n);
+
+        originalinteger=n;
+        while(n!=0)
+        {
+                remainder=n%10;
+                reversedinteger=reversedinteger*10+remainder;
+                n/=10;
+        }
+        if(originalinteger==reversedinteger)
+                        printf("%d is a palindrome.",originalinteger);
+                else          
+                        printf("%d is not a palindrome",originalinteger);
+                
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/5rQGP8B.png">
+
+### 16) To check whether a number is prime or not.
+```C
+/* Program to check prime no. */
+
+#include<stdio.h>
+int main()
+{
+        int n,c=2;
+                printf("enter a number to check whether it is prime\n");
+                scanf("%d",&n);
+        for(c=2;c<n;c++)
+        {
+                if(n%c==0)
+                {
+                printf("%d isn't prime.\n",n);
+                break;
+                }
+        }
+                if(c==n)
+                printf("%d is prime.\n",n);
+        return 0;
+}
+
+```
+<img src="https://i.imgur.com/R1g79Wx.png">
+
+### 17) Program to print prime number to 100.
+```C
+/* Prime number from 1 to 100 */
+ 
+ #include<stdio.h>                                                            int main()
+{                                                                                    for(int i=2;i<100;i++)
+        {       for(int j=2;j<i;j++)
+                {
+                if(i%j==0)                                                                           break;
+        else    
+                if(i==j+1)
+                printf("%d\n",i);
+                }
+        }
+return 0;
+}
+
+ 
+ ``` 
+<img src="https://i.imgur.com/YAdz3WX.png">
+
+### 18) Program to check whether a number is armstrong or not.
+```C
+/* To check armstrong number */
+
+#include <stdio.h>
+int main()
+{
+    int number, originalNumber, remainder, result = 0;
+
+printf("Enter a three digit integer: ");
+    scanf("%d", &number);
+
+originalNumber = number;
+
+while (originalNumber != 0)
+    {
+        remainder = originalNumber%10;
+        result += remainder*remainder*remainder;
+        originalNumber /= 10;
+
+}
+
+if(result == number)
+        printf("%d is an Armstrong number.",number);
+    else
+        printf("%d is not an Armstrong number.",number);
+
+return 0;
+}
+ 
+```
+<img src="https://i.imgur.com/V4nVoup.png">
+
+
+### 19) Print Different Patterns.
+i) Pattern 1.
+```C
+#include <stdio.h>
+int main() {
+    
+   int i,j,r;
+    
+   printf("Enter number of rows: ");
+    scanf("%d",&r);
+    
+for(i=1; i<=r; ++i)
+    {
+        for(j=1; j<=i; ++j)
+        {
+            printf("%d ",j);
+        }
+        printf("\n");
+    }
+    return 0;
+}
+
+```
+<img src="https://i.imgur.com/98sy3Bm.png">
+
+### ii) Pattern 2. 
+```C
+#include <stdio.h>
+int main() {
+    
+   int r,i,j,num= 1;
+   printf("Enter number of rows: ");
+    scanf("%d",&r);
+    for(i=1;i<=r;i++)
+    {
+        for(j=1;j<=i;++j)
+        {
+            printf("%d",num);
+            ++num;
+        }
+        printf("\n");
+    }
+    return 0;
+}
+
+```
+
+<img src="https://i.imgur.com/1mKkswJ.png">
+
+### 20) Program to find largest from 1 dimensional array.
+```C 
+/* Largest in 1 dimensional array */
+
+#include<stdio.h>
+
+int main()
+{
+        int array[100],maximum,size,c,location=1;
+        printf("Enter the number of elements in array \n");
+        scanf("%d",&size);
+
+        printf("enter %d integers\n",size);
+
+                for(c=0;c<size;c++)
+                scanf("%d",&array[c]);
+maximum=array[0];
+
+for(c=1;c<size;c++)
+        {
+                if(array[c]>maximum)
+                {
+                        maximum=array[c];
+                        location =c+1;
+                }
+        }
+
+printf("Largest element is present at ;location %d and it's value is %d.\n",location,maximum);
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/PtFRg8s.png">
+
+### 21) To find sum of the N natural numbers in an array.
+```C
+/* Sum of N no.s in array */
+     
+#include<stdio.h>
+
+int main() {
+    
+    int n, sum = 0, c, array[100];
+
+printf("Enter the number of integers you want to add: ");
+    scanf("%d", &n);
+
+ printf("\n\nEnter %d integers \n\n", n);
+
+for(c = 0; c < n; c++)
+   {
+        scanf("%d", &array[c]);
+        sum =sum+array[c];    // same as sum = sum + array[c]
+    }
+
+  printf("\n\nSum = %d\n\n", sum);
+    return 0;
+}
+
+```
+<img src="https://i.imgur.com/NjD8NyP.png">
+
+### 22) Program to add two matrices .
+```C
+/*  Addition of matrix */
+    
+#include <stdio.h>
+ 
+int main() {
+   
+   int m, n, c, d, first[10][10], second[10][10], sum[10][10];
+ 
+   printf("Enter the number of rows and columns of matrix\n");
+   scanf("%d%d", &m, &n);
+   
+   printf("Enter the elements of first matrix\n");
+ 
+   for (c = 0; c < m; c++)
+      for (d = 0; d < n; d++)
+         scanf("%d", &first[c][d]);
+ 
+   printf("Enter the elements of second matrix\n");
+ 
+   for (c = 0; c < m; c++)
+      for (d = 0 ; d < n; d++)
+         scanf("%d", &second[c][d]);
+   
+   printf("Sum of entered matrices:-\n");
+   
+   for (c = 0; c < m; c++) {
+      for (d = 0 ; d < n; d++) {
+         sum[c][d] = first[c][d] + second[c][d];
+         printf("%d\t", sum[c][d]);
+      }
+      printf("\n");
+   }
+ 
+   return 0;
+}
+
+```
+<img src="https://i.imgur.com/Qt9sy4i.png">
+
+### 23) Program to multiply two matrices .
+```C
+/* Multiplation of matrices */
+#include<stdio.h>
+int main()
+{
+        int m,n,p,q,c,d,k,sum=0;
+        int a[10][10],b[10][10],multiply[10][10];
+
+                printf("enter number of rows and columns of first matrix\n");
+                scanf("%d%d",&m,&n);
+                printf("enter elements of first matrix\n");
+
+        for(c=0;c<m;c++)
+                 for(d=0;d<n;d++)
+                        scanf("%d",&a[c][d]);
+                printf("enter number of rows and columns of second matrix\n");
+                scanf("%d%d",&p,&q);
+                      
+        if(n!=p)
+        printf("the matrices can't be multiplied with each other\n");
+        else
+        {
+                printf("enter elements of second matrix\n");
+
+        for(c=0;c<p;c++)
+                for(d=0;d<q;d++)
+                scanf("%d",&b[c][d]);
+
+                        for(c=0;c<m;c++)
+                        { for(d=0;d<q;d++)
+                                { for(k=0;k<p;k++)
+                                        {
+                                                sum = sum+a[c][k]*b[k][d];
+                                        }
+                                  multiply[c][d]=sum;
+                                   sum=0;
+       
+                                }
+                        }
+        printf("Product of the matrices :\n");
+        for(c=0;c<m;c++)
+                {
+                        for(d=0;d<q;d++)
+                        printf("%d \t",multiply[c][d]);
+
+                        printf("\n");
+                        }
+                }               
+                                        
+return 0;                                       
+}                                       
+ 
+```
+<img src="https://i.imgur.com/XNR76F1.png">
+
+### 24) Program to check whether  a string is palindrome or not .
+```C
+#include<stdio.h>
+#include <string.h>
+ 
+int main() {
+    char s[1000];
+    int i,n,c=0;
+ 
+   printf("Enter  the string : ");
+   gets(s);
+   n=strlen(s);
+ 
+for(i=0;i<n/2;i++)
+    {
+    	if(s[i]==s[n-i-1])
+    	c++;
+ 
+ 	}
+if(c==i)
+ 	    printf("string is palindrome \n");
+    else
+        printf("string is not palindrome \n");
+ 
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/hgnW0GS.png">
+
+### 25) Program to perform basic operations like lenghth of string ,string concat, string copy ,string compare and string reverse.
+```C
+/*Fundamental string operation, lenth, concatenation, compare and copy strings without string.h */
+
+#include <stdio.h> 
+#include <stdlib.h>
+  
+int find_length(char string[]) {
+    int len = 0, i;
+    for (i = 0; string[i] != '\0'; i++) {
+      len++;
+    }
+    return len;
+  }
+
+void join_strings(char string1[], char string2[]) {
+  int i, len1, len2;
+  len1 = find_length(string1);
+  len2 = find_length(string2);
+  for (i = len1; i < len1 + len2; i++) {
+    string1[i] = string2[i - len1];
+  }
+  string1[i] = '\0'; //adding null character at the end of input
+}
+/*returns 0 if thery are same otherwise returns 1*/
+
+int compare_strings(char string1[], char string2[]) {
+  int len1, len2, i, count = 0;
+  len1 = find_length(string1);
+  len2 = find_length(string2);
+   if (len1 != len2)
+    return 1;
+  for (i = 0; i < len1; i++) {
+    if (string1[i] == string2[i])
+      count++;
+  }
+  if (count == len1)
+    return 0;
+  return 1;
+}
+
+void copy_string(char destination[], char source[]) {
+  int len, i;
+  len = find_length(source);
+  for (i = 0; i < len; i++) {
+    destination[i] = source[i];
+  }
+  destination[i] = '\0';
+}
+
+int main() {
+  char string1[20], string2[20]; //string variables declaration with size 20
+  int choice;
+  while (1) {
+    printf("\n1. Find Length \n2. Concatenate \n3. Compare \n4. Copy \n5. Exit\n");
+    printf("Enter your choice: ");
+    scanf("%d", & choice);
+    switch (choice) {
+    case 1:
+      printf("Enter the string: ");
+      scanf("%s", string1);
+      printf("The length of string is %d", find_length(string1));
+      break;
+    case 2:
+      printf("Enter two strings: ");
+      scanf("%s%s", string1, string2);
+      join_strings(string1, string2);
+      printf("The concatenated string is %s", string1);
+      break;
+    case 3:
+      printf("Enter two strings: ");
+      scanf("%s%s", string1, string2);
+      if (compare_strings(string1, string2) == 0) {
+        printf("They are equal");
+      } else {
+        printf("They are not equal");
+      }
+      break;
+    case 4:
+      printf("Enter a string: ");
+      scanf("%s", string1);
+      printf("String1 = %s\n");
+      printf("After copying string1 to string 2\n");
+      copy_string(string2, string1);
+      printf("String2 = %s", string2);
+      break;
+    case 5:
+      exit(0);
+    }
+  }
+  return 0;
+}
+
+```
+<img src="https://i.imgur.com/1TrUezs.png">
+
+### 26) Programs to swap two numbers using call by value and call by refernce.
+```C
+/* Call by reference */
+
+#include <stdio.h>
+void swap(int*, int*);
+ 
+int main() {
+   
+   int x, y;
+ 
+   printf("Enter the value of x and y\n");
+   scanf("%d%d",&x,&y);
+ 
+   printf("Before Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   swap(&x, &y); 
+ 
+   printf("After Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   return 0;
+}
+ 
+void swap(int *a, int *b)
+{
+   int temp;
+ 
+   temp = *b;
+   *b = *a;
+   *a = temp;
+}
+```
+<img src="https://i.imgur.com/MrETglI.png">
+
+### call by value:- 
+```C
+/* Call by value */
+
+#include <stdio.h>
+ 
+void swap(int, int);
+ 
+int main() {
+   
+   int x, y;
+ 
+   printf("Enter the value of x and y\n");
+   scanf("%d%d",&x,&y);
+ 
+   printf("Before Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   swap(x, y); 
+ 
+   printf("After Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   return 0;
+}
+ 
+void swap(int a, int b) {
+   int temp;
+ 
+   temp = b;
+   b = a;
+   a = temp;
+    printf("Values of a and b is %d  %d\n",a,b);
+}
+```
+   
+### 27) Program to calculate factorial of a number with and without recursion both.
+```C
+/* Recursion */
+
+#include<stdio.h>
+long int multiplyNumbers(int n);
+int main() {
+    
+int n;
+    printf("Enter a positive integer: ");
+    scanf("%d", &n);
+    printf("Factorial of %d = %ld", n, multiplyNumbers(n));
+    return 0;
+}
+long int multiplyNumbers(int n)
+{
+    if (n >= 1)
+        return n*multiplyNumbers(n-1);
+    else
+        return 1;
+}
+```
+<img src="https://i.imgur.com/whUpb1M.png">
+
+```C
+/* Without recrsion: */
+
+#include <stdio.h>
+
+int main() {
+  
+  int c, n, fact = 1;
+ 
+  printf("Enter a number to calculate its factorial\n");
+  scanf("%d", &n);
+ 
+  for (c = 1; c <= n; c++)
+    fact = fact * c;
+ 
+  printf("Factorial of %d = %d\n", n, fact);
+ 
+  return 0;
+}
+```
+### 28) Program to print fibonacci series with and without recursion both.
+```C
+/* Program to print fibonaci series with recursion */
+
+#include<stdio.h>
+void series(int);		//prototype
+
+int main() {
+
+  int n;
+
+printf("\n\nEnter the number of terms you wish.......");
+  scanf("%d",&n);
+  printf("\n\n");
+
+  series(n);			// function call
+  printf("\n\n\n");
+
+  return 0;
+}
+
+void series(int n)		// definition
+
+{
+   int t1=0,t2=1,next;
+
+   for(int i=0;i<=n;i++)
+  {
+    printf("%d\t",t1);
+
+    next=t1+t2;
+    t1=t2;
+    t2=next;
+  }
+}
+
+
+```
+<img src="https://i.imgur.com/BYBzV8v.png">
+
+#
+```C
+// Fibonaci series without  recursion:-
+#include <stdio.h>
+int fibo(int);
+ 
+int main() {
+
+int num;
+int result;
+ 
+  printf("Enter the nth number in fibonacci series: ");
+    scanf("%d", &num);
+    if (num < 0)
+    {
+        printf("Fibonacci of negative number is not possible.\n");
+    }
+    else
+    {
+        result = fibo(num);
+        printf("The %d number in fibonacci series is %d\n", num, result);
+    }
+    return 0;
+}
+
+int fibo(int num)
+{
+    if (num == 0)
+    {
+        return 0;
+    }
+    else if (num == 1)
+    {
+        return 1;
+    }
+    else
+    {
+        return(fibo(num - 1) + fibo(num - 2));
+    }
+}
+```
+<img src="">
+
+### 29) Program to calculate average of 5 numbers using function.
+```C
+ /* program to find average of 5 numbers  */
+ 
+#include<stdio.h>
+int avg(int,int,int,int,int);      // prototype
+ 
+int main() { int a1,a2,a3,a4,a5,res;
+   
+   printf("\nEnter the numbers respectiively....");
+   scanf("%d%d%d%d%d",&a1,&a2,&a3,&a4,&a5);
+   
+   res=avg(a1,a2,a3,a4,a5);     // function call
+   printf("Average of the numbers %d",res);
+   
+   return 0; 
+ }
+ 
+ int avg(int a1,int a2,int a3,int a4,int a5)      // definition
+ 
+ { int p; 
+   p=(a1+a2+a3+a4+a5)/5;
+   return p;
+ }
+
+```
+<img src="https://i.imgur.com/Q1q4Ofd.png">
+
+### 30) Program to implement linear search and binary.
+ ```C
+/* Program to implement linear search and Binary search */
+
+#include <stdio.h>
+int main()
+{
+int array[50] ,search,n,c;
+
+printf("enter the number of elements in array\n");
+scanf("%d",&n);
+
+printf("enter %d integer(s) \n",n);
+
+for(c=0;c<n;c++)
+scanf("%d",&array[c]);
+
+printf("enter a number to be searched\n");
+scanf("%d",&search);
+
+for(c=0;c<n;c++)    
+        {
+        if(array[c]==search)
+                {
+                        printf("%d is present at location %d.\n", search ,c+1);
+        break;
+                }
+
+        }
+if(c==n)
+printf("%d isn't present in the array\n",search);
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/ANAAACj.png">
+
+### 31) Program to implement binary.
+ ```C
+#include<stdio.h>
+int binarysearch(int arr[],int l,int r,int x)
+{
+        if (r>=1)
+        { int mid=l+(r-1)/2;
+        }
+        if(arr[mid]==x)
+        return mid;
+
+        if (arr[mid]>x)
+        return binarysearch(arr,l,mid-1,x);
+
+        return binarysearch(arr,l,mid-1,x);
+        }
+        
+        return -1;
+ }
+
+        int main(void)
+{
+        int arr[]={2,3,4,10,40};
+        int n=sizeof(arr)/sizeof (arr[0]);
+        int x=10;
+        int result =binarysearch(arr,0,n-1,x);
+        (result==-1); : printf("element is not present");
+                     :printf("element is present at index %d",
+                        result);
+        return 0;
+}
+```
+<img src="https://i.imgur.com/ANAAACj.png">
+
+### 32) Program to implement bubble sort.
+```C
+   /* Bubble sort implementation  */
+ 
+#include <stdio.h>
+ 
+int main()
+{
+  int array[100], n, c, d, swap;
+ 
+  printf("Enter number of elements\n");
+  scanf("%d", &n);
+ 
+  printf("Enter %d integers\n", n);
+ 
+  for (c = 0; c < n; c++)
+    scanf("%d", &array[c]);
+ 
+  for (c = 0 ; c < n - 1; c++)
+  {
+    for (d = 0 ; d < n - c - 1; d++)
+    {
+      if (array[d] > array[d+1]) /* For decreasing order use < */
+      {
+        swap       = array[d];
+        array[d]   = array[d+1];
+        array[d+1] = swap;
+      }
+    }
+  }
+ 
+  printf("Sorted list in ascending order:\n");
+ 
+  for (c = 0; c < n; c++)
+     printf("%d\n", array[c]);
+ 
+  return 0;
+}
+
+```
+<img src="https://i.imgur.com/dvQg0s2.png">
+
+### 33) Program to store information of 10 students using array of structures.
+```C
+/* Structures for student */
+
+#include<stdio.h>
+struct student
+{
+  char name[20],address[30];
+  int grade,roll,dob;
+};
+
+int main()
+{
+  struct student s[10];
+  int i;
+  for(i=0;i<10;i++)
+  {
+    printf("\nEnter records for student[%d]\n",i+1);
+    printf("Enter name: ");
+    gets(s[i].name);
+    printf("Enter address: ");
+    gets(s[i].address);
+    printf("Enter class, roll number and date of birth(year): ");
+    scanf("%d%d%d",&s[i].grade,&s[i].roll,&s[i].dob);
+  }
+  printf("Records of the 10 students are here");
+  for(i=0;i<10;i++)
+  {
+    printf("\nStudent %d",i+1);
+    printf("\nName: %s",s[i].name);
+    printf("\nAddress: %s",s[i].address);
+    printf("\nClass: %d",s[i].grade);
+    printf("\nRoll No.: %d",s[i].roll);
+    printf("\nDOB: %d",s[i].dob);
+    printf("\n");
+  }
+  return 0;
+}
+
+```
+
+<img src="https://i.imgur.com/nxw83jI.png">
+
+### 34) Programs to compute the transpose of a matrix.
+```C
+#include<stdio.h>
+
+int main()
+{
+        int a[10][10],transpose[10][10],r,c,i,j;
+        printf("enter rows and columns of matrix:");
+        scanf("%d%d",&r,&c);
+
+        printf("\n Enter elements of matrix:\n");
+        for(i=0;i<r;++i)
+                for(j=0;j<c;++j)
+                {
+                printf("enter element a%d%d: ",i+1,j+1);
+                scanf("%d",&a[i][j]);
+                }
+
+        printf("\n Entered Matrix: \n");
+        for(i=0;i<r;++i)
+                for(j=0;j<c;++j)
+                 {
+                        printf("%d  ",a[i][j]);
+
+                        if(j==c-1)
+                                printf("\n\n");
+                }
+
+                for(i=0;i<r;++i)
+                        for(j=0;j<c;++j)
+                        {
+                                transpose[j][i]=a[i][j];
+                        }
+
+        printf("\nTranspose of Matrix :\n");
+                for(i=0;i<c;++i)
+                        for(j=0;j<r;++j)
+                        {
+                                printf("%d  ",transpose[i][j]);
+                                if(j==r-1)
+                                        printf("\n\n");
+                        }
+        return 0;               
+}               
+
+
+```
+<img src="https://i.imgur.com/vqnNFuR.png">
+
+### 35) Program to access array using pointer.
+```C
+#include <stdio.h>
+int main()
+{
+   int data[5],i;
+   printf("Enter elements: ");
+   for(i = 0; i < 5; ++i)
+     scanf("%d", data + i);
+   printf("You entered: \n");
+   for(i = 0; i < 5; ++i)
+      printf("%d\n", *(data + i));
+   return 0;
+}
+
+```
+<img src="https://i.imgur.com/9MZAW0G.png">
+
diff --git a/README.md b/README.md
index ca04a7d..e7f8936 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,1329 @@
 # PPS
 Programming for Problem Solving
+![](https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcT62gxSPP7isA7BEncc_4ZyUxYKsVKbV8ruG3_L9Chk3yKHEZ9y)
+# **Programming for Problem Solving**
+## **Name** - Naman Marria
+## **CRN -1915369**
+## **Branch - CSE-C2**
+## **Submitted to:- Ms Goldendeep Kaur **
+---
+
+### 1) To print name.
+```C
+      /* Program to print your name */
+
+#include<stdio.h>
+int main() {
+
+puts("***************");
+puts("Naman Marria");
+puts("***************");
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/ypHqS9z.jpg">
+
+### 2) To print College address.
+```C
+        /* College Address */
+ 
+#include<stdio.h>
+int main() {
+
+printf("\n\t\t\tGuru Nanak Dev Engineering College,");
+printf("\n\t\t\tGill Road,");
+printf("\n\t\t\tLudhiana, Punjab\n");
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/bhEApPD.jpg">
+
+### 3) Program to add two integers.
+```C
+     /* To add two integers */
+
+#include <stdio.h>
+int main() {
+    
+int a,b;
+
+printf("\nEnter the numbers....");
+
+printf("\nA:");
+scanf("%d",&a);
+
+printf("\nB:");
+scanf("%d",&b);
+
+a=a+b;
+
+printf("\n Sum of the number is %d ",a);
+
+return 0;
+
+}
+```
+<img src="https://i.imgur.com/4DdtQBP.jpg">
+
+### 4) Program to find quotient and remainder.
+```C
+    /* To find quotient and remainder */
+
+#include <stdio.h>
+
+int main() {
+    
+int a,b,r,q;
+
+printf("\nEnter the Dividend:");
+scanf("%d",&a);
+
+printf("\nEnter the divisor:");
+scanf("%d",&b);
+
+r=a%b;
+q=a/b;
+
+printf("\nRemainder: %d",r);
+printf("\nQuotient: %d",q);
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/0W6jXQU.png">
+
+
+### 5) Program to swap two variables without 3rd variable.
+```C
+    /* Swapping without 3rd variable  */
+
+#include <stdio.h>
+int main() {
+    
+int a,b;
+
+printf("\nEnter the value of A:");
+scanf("%d",&a);
+
+printf("\nEnter the value of B:");
+scanf("%d",&b);
+
+   a = a + b;
+   b = a - b;
+   a = a - b;
+   
+printf("\nA: %d",a);
+printf("\nB: %d",b);
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/k8DDgWr.png">
+
+### 6) Program to check even odd number.
+```C
+/* To find whether number is even or odd */
+
+#include<stdio.h>                                                            int main()
+{
+        int x;
+        printf("enter an integer \n");                                       
+        scanf("%d",&x);
+        if(x%2==0)                                                           
+        printf("even\n");
+        else                                                                 
+        printf("odd\n");
+
+        return 0;
+}
+
+```
+<img src="https://i.imgur.com/cZ6XARD.png">
+
+### 7) Finding greteast of two numbers.
+```C
+     /* Largest one in two */
+
+#include<stdio.h>
+int main()
+{
+        int a,b;
+                printf("enter the two integers a and b respectively \n");
+                scanf("%d%d",&a,&b);
+
+        if(a==b)
+                printf("Both  the numbers are equal\n");
+        else
+                {
+                        if(a>b)
+                        printf("a is greater than b\n",a);
+                        else
+                        printf("b is greater than a\n",b);
+                }
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/jp4XnM9.png">
+
+### 8) Find greatest of three number .
+```C
+/* Largest of three number */
+
+#include<stdio.h>
+int main()
+{
+        int x,y,z;
+        printf("enter the 3 integers -a,b,c respectively \n");
+        scanf("%d%d%d",&x,&y,&z);
+        if(x>y && x>z)
+        printf("a is the greatest number \n",x);
+        else
+                {                                                            
+                        if(y>x && y>z)
+                        printf("b is the greatest number \n",y);             
+                        else
+                        printf("c is the greatest number \n",z);             
+                }
+return 0;                                                                    
+               
+
+```
+<img src="https://i.imgur.com/AZ9vB3V.png">
+
+### 9) Program to assign grade to student according to percentage.
+```C
+/* To find grade of a student by marks */
+
+#include<stdio.h>
+int main() { 
+    
+  int s1,s2,s3,s4,s5,agg;
+  float perc;
+
+  printf("Enter the Marks in 5 Subjects Respectively:\n");
+
+scanf("%d%d%d%d%d",&s1,&s2,&s3,&s4,&s5);
+
+agg=s1+s2+s3+s4+s5; // Aggregate Marks
+  
+  perc=agg/500.0*100;  // Perc Marks
+
+  if(perc>=90)
+  {
+      printf("\nA");
+      
+  }
+  
+  else if (perc>=80 && perc<90)
+  { 
+      printf("\nB");
+      
+  }
+  
+  else if(perc>=70 && perc<80)
+  {
+      printf("\nC");
+      
+  }
+  
+  else if(perc>=60 && perc<70)
+  { 
+      printf("\nD");
+  }
+  else if(perc>=50 && perc<60)
+  {
+      printf("\nE");
+  }
+  else 
+     {
+          printf("\nScope of Improvement....");
+    } 
+    return 0;
+}
+```
+<img src="https://i.imgur.com/ssrLTTz.png">
+
+### 10) Program to print roots of quadratic equation.
+```C
+/*Program to print roots */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+ 
+int main() {
+    float a, b, c, root1, root2;
+    float realp, imagp, disc;
+ 
+printf("Enter the values of a, b and c \n");
+    scanf("%f %f %f", &a, &b, &c);
+    
+/* If a = 0, it is not a quadratic equation */
+
+if (a == 0 || b == 0 || c == 0)
+    {
+        printf("Error: Roots cannot be determined \n");
+        exit(1);
+    }
+    else
+    {
+        disc = b * b - 4.0 * a * c;
+        if (disc < 0)
+        {
+            printf("Imaginary Roots\n");
+            realp = -b / (2.0 * a) ;
+            imagp = sqrt(abs(disc)) / (2.0 * a);
+            printf("Root1 = %f  +i %f\n", realp, imagp);
+            printf("Root2 = %f  -i %f\n", realp, imagp);
+        }
+
+else if (disc == 0)
+        {
+            printf("Roots are real and equal\n");
+            root1 = -b / (2.0 * a);
+            root2 = root1;
+            printf("Root1 = %f\n", root1);
+            printf("Root2 = %f\n", root2);
+        }
+
+else if (disc > 0 )
+        {
+            printf("Roots are real and distinct \n");
+            root1 =(-b + sqrt(disc)) / (2.0 * a);
+            root2 =(-b - sqrt(disc)) / (2.0 * a);
+            printf("Root1 = %f  \n", root1);
+            printf("Root2 = %f  \n", root2);
+        }
+
+}
+   return 0;
+}
+
+```
+<img src="https://i.imgur.com/dPqG2D0.png">
+
+### 11) Program to check year is leap or not.
+```C
+/* To find whether year is leap or not */
+
+#include<stdio.h>
+int main()
+{
+        int year;
+printf("enter a year :");
+scanf("%d",&year);
+        if(year%4==0)
+        {       if(year%100==0)
+                        {
+                                if(year%400==0)
+                                printf("%d is a leap year\n",year);
+
+                                else
+                                 printf("%d is not a leap year\n",year);
+
+                        }
+                else
+                printf("%d is a leap year\n",year);
+
+                 }
+          else
+                printf("%d is not a leap year .\n",year);
+
+        return 0;       
+}                       
+                
+```
+<img src="https://i.imgur.com/HUAMcCB.png">
+
+### 12) Program to print table of 5.
+```C
+/* Table of 5 */
+
+#include<stdio.h>
+
+int main() { int res;
+
+for(int i=1;i<=10;i++) {
+
+res=5*i;
+    
+   printf("\n5*%d=%d",i,res);
+   }
+
+   return 0;
+}
+```
+<img src="https://i.imgur.com/tsPglL3.png">
+
+### 13) To make simple calculator using switch case.
+```C
+/* C Program to Create Simple Calculator using Switch Case */
+ 
+#include <stdio.h>
+ 
+int main() {
+	char Operator;
+	float num1, num2, result = 0;
+	
+printf("\n Please Enter an Operator (+, -, *, /)  :  ");
+scanf("%c", &Operator);
+  	
+printf("\n Please Enter the Values for two Operands: num1 and num2  :  ");
+scanf("%f%f", &num1, &num2);
+  	
+switch(Operator)
+  	{
+  		case '+':
+  			result = num1 + num2;
+  			break;
+  		case '-':
+  			result = num1 - num2;
+  			break;
+  		case '*':
+  			result = num1 * num2;
+  			break;
+  		case '/':
+  			result = num1 / num2;
+  			break;
+		default:
+			printf("\n You have enetered an Invalid Operator ");				    			
+	}
+  
+printf("\n The result of %.2f %c %.2f  = %.2f \n", num1, Operator, num2, result);
+	
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/nh6QlRj.png">
+
+### 14) To calculate reverse of a number.
+```C
+/* To find reverse of a Number*/
+
+#include<stdio.h>
+int main() { 
+
+  int num,rev=0;
+
+  printf("\nEnter the Number:");
+  scanf("%ld",&num);
+
+while(num!=0)
+{ 
+    rev = rev * 10;
+    rev = rev + num%10;
+    num = num/10;
+  }
+  
+
+  printf("\nReversed number:%d",rev);
+
+  printf("\n\n");
+  return 0;
+}
+
+
+```
+<img src="https://i.imgur.com/bcLhcLk.png">
+
+### 15) To check whether number is palindrome or not.
+```C
+/* Palindrome */
+
+#include<stdio.h>
+int main()
+{
+        int n , reversedinteger =0,remainder,originalinteger;
+        printf("enter an integer ");
+        scanf("%d",&n);
+
+        originalinteger=n;
+        while(n!=0)
+        {
+                remainder=n%10;
+                reversedinteger=reversedinteger*10+remainder;
+                n/=10;
+        }
+        if(originalinteger==reversedinteger)
+                        printf("%d is a palindrome.",originalinteger);
+                else          
+                        printf("%d is not a palindrome",originalinteger);
+                
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/5rQGP8B.png">
+
+### 16) To check whether a number is prime or not.
+```C
+/* Program to check prime no. */
+
+#include<stdio.h>
+int main()
+{
+        int n,c=2;
+                printf("enter a number to check whether it is prime\n");
+                scanf("%d",&n);
+        for(c=2;c<n;c++)
+        {
+                if(n%c==0)
+                {
+                printf("%d isn't prime.\n",n);
+                break;
+                }
+        }
+                if(c==n)
+                printf("%d is prime.\n",n);
+        return 0;
+}
+
+```
+<img src="https://i.imgur.com/R1g79Wx.png">
+
+### 17) Program to print prime number to 100.
+```C
+/* Prime number from 1 to 100 */
+ 
+ #include<stdio.h>                                                            int main()
+{                                                                                    for(int i=2;i<100;i++)
+        {       for(int j=2;j<i;j++)
+                {
+                if(i%j==0)                                                                           break;
+        else    
+                if(i==j+1)
+                printf("%d\n",i);
+                }
+        }
+return 0;
+}
+
+ 
+ ``` 
+<img src="https://i.imgur.com/YAdz3WX.png">
+
+### 18) Program to check whether a number is armstrong or not.
+```C
+/* To check armstrong number */
+
+#include <stdio.h>
+int main()
+{
+    int number, originalNumber, remainder, result = 0;
+
+printf("Enter a three digit integer: ");
+    scanf("%d", &number);
+
+originalNumber = number;
+
+while (originalNumber != 0)
+    {
+        remainder = originalNumber%10;
+        result += remainder*remainder*remainder;
+        originalNumber /= 10;
+
+}
+
+if(result == number)
+        printf("%d is an Armstrong number.",number);
+    else
+        printf("%d is not an Armstrong number.",number);
+
+return 0;
+}
+ 
+```
+<img src="https://i.imgur.com/V4nVoup.png">
+
+
+### 19) Print Different Patterns.
+i) Pattern 1.
+```C
+#include <stdio.h>
+int main() {
+    
+   int i,j,r;
+    
+   printf("Enter number of rows: ");
+    scanf("%d",&r);
+    
+for(i=1; i<=r; ++i)
+    {
+        for(j=1; j<=i; ++j)
+        {
+            printf("%d ",j);
+        }
+        printf("\n");
+    }
+    return 0;
+}
+
+```
+<img src="https://i.imgur.com/98sy3Bm.png">
+
+### ii) Pattern 2. 
+```C
+#include <stdio.h>
+int main() {
+    
+   int r,i,j,num= 1;
+   printf("Enter number of rows: ");
+    scanf("%d",&r);
+    for(i=1;i<=r;i++)
+    {
+        for(j=1;j<=i;++j)
+        {
+            printf("%d",num);
+            ++num;
+        }
+        printf("\n");
+    }
+    return 0;
+}
+
+```
+
+<img src="https://i.imgur.com/1mKkswJ.png">
+
+### 20) Program to find largest from 1 dimensional array.
+```C 
+/* Largest in 1 dimensional array */
+
+#include<stdio.h>
+
+int main()
+{
+        int array[100],maximum,size,c,location=1;
+        printf("Enter the number of elements in array \n");
+        scanf("%d",&size);
+
+        printf("enter %d integers\n",size);
+
+                for(c=0;c<size;c++)
+                scanf("%d",&array[c]);
+maximum=array[0];
+
+for(c=1;c<size;c++)
+        {
+                if(array[c]>maximum)
+                {
+                        maximum=array[c];
+                        location =c+1;
+                }
+        }
+
+printf("Largest element is present at ;location %d and it's value is %d.\n",location,maximum);
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/PtFRg8s.png">
+
+### 21) To find sum of the N natural numbers in an array.
+```C
+/* Sum of N no.s in array */
+     
+#include<stdio.h>
+
+int main() {
+    
+    int n, sum = 0, c, array[100];
+
+printf("Enter the number of integers you want to add: ");
+    scanf("%d", &n);
+
+ printf("\n\nEnter %d integers \n\n", n);
+
+for(c = 0; c < n; c++)
+   {
+        scanf("%d", &array[c]);
+        sum =sum+array[c];    // same as sum = sum + array[c]
+    }
+
+  printf("\n\nSum = %d\n\n", sum);
+    return 0;
+}
+
+```
+<img src="https://i.imgur.com/NjD8NyP.png">
+
+### 22) Program to add two matrices .
+```C
+/*  Addition of matrix */
+    
+#include <stdio.h>
+ 
+int main() {
+   
+   int m, n, c, d, first[10][10], second[10][10], sum[10][10];
+ 
+   printf("Enter the number of rows and columns of matrix\n");
+   scanf("%d%d", &m, &n);
+   
+   printf("Enter the elements of first matrix\n");
+ 
+   for (c = 0; c < m; c++)
+      for (d = 0; d < n; d++)
+         scanf("%d", &first[c][d]);
+ 
+   printf("Enter the elements of second matrix\n");
+ 
+   for (c = 0; c < m; c++)
+      for (d = 0 ; d < n; d++)
+         scanf("%d", &second[c][d]);
+   
+   printf("Sum of entered matrices:-\n");
+   
+   for (c = 0; c < m; c++) {
+      for (d = 0 ; d < n; d++) {
+         sum[c][d] = first[c][d] + second[c][d];
+         printf("%d\t", sum[c][d]);
+      }
+      printf("\n");
+   }
+ 
+   return 0;
+}
+
+```
+<img src="https://i.imgur.com/Qt9sy4i.png">
+
+### 23) Program to multiply two matrices .
+```C
+/* Multiplation of matrices */
+#include<stdio.h>
+int main()
+{
+        int m,n,p,q,c,d,k,sum=0;
+        int a[10][10],b[10][10],multiply[10][10];
+
+                printf("enter number of rows and columns of first matrix\n");
+                scanf("%d%d",&m,&n);
+                printf("enter elements of first matrix\n");
+
+        for(c=0;c<m;c++)
+                 for(d=0;d<n;d++)
+                        scanf("%d",&a[c][d]);
+                printf("enter number of rows and columns of second matrix\n");
+                scanf("%d%d",&p,&q);
+                      
+        if(n!=p)
+        printf("the matrices can't be multiplied with each other\n");
+        else
+        {
+                printf("enter elements of second matrix\n");
+
+        for(c=0;c<p;c++)
+                for(d=0;d<q;d++)
+                scanf("%d",&b[c][d]);
+
+                        for(c=0;c<m;c++)
+                        { for(d=0;d<q;d++)
+                                { for(k=0;k<p;k++)
+                                        {
+                                                sum = sum+a[c][k]*b[k][d];
+                                        }
+                                  multiply[c][d]=sum;
+                                   sum=0;
+       
+                                }
+                        }
+        printf("Product of the matrices :\n");
+        for(c=0;c<m;c++)
+                {
+                        for(d=0;d<q;d++)
+                        printf("%d \t",multiply[c][d]);
+
+                        printf("\n");
+                        }
+                }               
+                                        
+return 0;                                       
+}                                       
+ 
+```
+<img src="https://i.imgur.com/XNR76F1.png">
+
+### 24) Program to check whether  a string is palindrome or not .
+```C
+#include<stdio.h>
+#include <string.h>
+ 
+int main() {
+    char s[1000];
+    int i,n,c=0;
+ 
+   printf("Enter  the string : ");
+   gets(s);
+   n=strlen(s);
+ 
+for(i=0;i<n/2;i++)
+    {
+    	if(s[i]==s[n-i-1])
+    	c++;
+ 
+ 	}
+if(c==i)
+ 	    printf("string is palindrome \n");
+    else
+        printf("string is not palindrome \n");
+ 
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/hgnW0GS.png">
+
+### 25) Program to perform basic operations like lenghth of string ,string concat, string copy ,string compare and string reverse.
+```C
+/*Fundamental string operation, lenth, concatenation, compare and copy strings without string.h */
+
+#include <stdio.h> 
+#include <stdlib.h>
+  
+int find_length(char string[]) {
+    int len = 0, i;
+    for (i = 0; string[i] != '\0'; i++) {
+      len++;
+    }
+    return len;
+  }
+
+void join_strings(char string1[], char string2[]) {
+  int i, len1, len2;
+  len1 = find_length(string1);
+  len2 = find_length(string2);
+  for (i = len1; i < len1 + len2; i++) {
+    string1[i] = string2[i - len1];
+  }
+  string1[i] = '\0'; //adding null character at the end of input
+}
+/*returns 0 if thery are same otherwise returns 1*/
+
+int compare_strings(char string1[], char string2[]) {
+  int len1, len2, i, count = 0;
+  len1 = find_length(string1);
+  len2 = find_length(string2);
+   if (len1 != len2)
+    return 1;
+  for (i = 0; i < len1; i++) {
+    if (string1[i] == string2[i])
+      count++;
+  }
+  if (count == len1)
+    return 0;
+  return 1;
+}
+
+void copy_string(char destination[], char source[]) {
+  int len, i;
+  len = find_length(source);
+  for (i = 0; i < len; i++) {
+    destination[i] = source[i];
+  }
+  destination[i] = '\0';
+}
+
+int main() {
+  char string1[20], string2[20]; //string variables declaration with size 20
+  int choice;
+  while (1) {
+    printf("\n1. Find Length \n2. Concatenate \n3. Compare \n4. Copy \n5. Exit\n");
+    printf("Enter your choice: ");
+    scanf("%d", & choice);
+    switch (choice) {
+    case 1:
+      printf("Enter the string: ");
+      scanf("%s", string1);
+      printf("The length of string is %d", find_length(string1));
+      break;
+    case 2:
+      printf("Enter two strings: ");
+      scanf("%s%s", string1, string2);
+      join_strings(string1, string2);
+      printf("The concatenated string is %s", string1);
+      break;
+    case 3:
+      printf("Enter two strings: ");
+      scanf("%s%s", string1, string2);
+      if (compare_strings(string1, string2) == 0) {
+        printf("They are equal");
+      } else {
+        printf("They are not equal");
+      }
+      break;
+    case 4:
+      printf("Enter a string: ");
+      scanf("%s", string1);
+      printf("String1 = %s\n");
+      printf("After copying string1 to string 2\n");
+      copy_string(string2, string1);
+      printf("String2 = %s", string2);
+      break;
+    case 5:
+      exit(0);
+    }
+  }
+  return 0;
+}
+
+```
+<img src="https://i.imgur.com/1TrUezs.png">
+
+### 26) Programs to swap two numbers using call by value and call by refernce.
+```C
+/* Call by reference */
+
+#include <stdio.h>
+void swap(int*, int*);
+ 
+int main() {
+   
+   int x, y;
+ 
+   printf("Enter the value of x and y\n");
+   scanf("%d%d",&x,&y);
+ 
+   printf("Before Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   swap(&x, &y); 
+ 
+   printf("After Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   return 0;
+}
+ 
+void swap(int *a, int *b)
+{
+   int temp;
+ 
+   temp = *b;
+   *b = *a;
+   *a = temp;
+}
+```
+<img src="https://i.imgur.com/MrETglI.png">
+
+### call by value:- 
+```C
+/* Call by value */
+
+#include <stdio.h>
+ 
+void swap(int, int);
+ 
+int main() {
+   
+   int x, y;
+ 
+   printf("Enter the value of x and y\n");
+   scanf("%d%d",&x,&y);
+ 
+   printf("Before Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   swap(x, y); 
+ 
+   printf("After Swapping\nx = %d\ny = %d\n", x, y);
+ 
+   return 0;
+}
+ 
+void swap(int a, int b) {
+   int temp;
+ 
+   temp = b;
+   b = a;
+   a = temp;
+    printf("Values of a and b is %d  %d\n",a,b);
+}
+```
+   
+### 27) Program to calculate factorial of a number with and without recursion both.
+```C
+/* Recursion */
+
+#include<stdio.h>
+long int multiplyNumbers(int n);
+int main() {
+    
+int n;
+    printf("Enter a positive integer: ");
+    scanf("%d", &n);
+    printf("Factorial of %d = %ld", n, multiplyNumbers(n));
+    return 0;
+}
+long int multiplyNumbers(int n)
+{
+    if (n >= 1)
+        return n*multiplyNumbers(n-1);
+    else
+        return 1;
+}
+```
+<img src="https://i.imgur.com/whUpb1M.png">
+
+```C
+/* Without recrsion: */
+
+#include <stdio.h>
+
+int main() {
+  
+  int c, n, fact = 1;
+ 
+  printf("Enter a number to calculate its factorial\n");
+  scanf("%d", &n);
+ 
+  for (c = 1; c <= n; c++)
+    fact = fact * c;
+ 
+  printf("Factorial of %d = %d\n", n, fact);
+ 
+  return 0;
+}
+```
+### 28) Program to print fibonacci series with and without recursion both.
+```C
+/* Program to print fibonaci series with recursion */
+
+#include<stdio.h>
+void series(int);		//prototype
+
+int main() {
+
+  int n;
+
+printf("\n\nEnter the number of terms you wish.......");
+  scanf("%d",&n);
+  printf("\n\n");
+
+  series(n);			// function call
+  printf("\n\n\n");
+
+  return 0;
+}
+
+void series(int n)		// definition
+
+{
+   int t1=0,t2=1,next;
+
+   for(int i=0;i<=n;i++)
+  {
+    printf("%d\t",t1);
+
+    next=t1+t2;
+    t1=t2;
+    t2=next;
+  }
+}
+
+
+```
+<img src="https://i.imgur.com/BYBzV8v.png">
+
+#
+```C
+// Fibonaci series without  recursion:-
+#include <stdio.h>
+int fibo(int);
+ 
+int main() {
+
+int num;
+int result;
+ 
+  printf("Enter the nth number in fibonacci series: ");
+    scanf("%d", &num);
+    if (num < 0)
+    {
+        printf("Fibonacci of negative number is not possible.\n");
+    }
+    else
+    {
+        result = fibo(num);
+        printf("The %d number in fibonacci series is %d\n", num, result);
+    }
+    return 0;
+}
+
+int fibo(int num)
+{
+    if (num == 0)
+    {
+        return 0;
+    }
+    else if (num == 1)
+    {
+        return 1;
+    }
+    else
+    {
+        return(fibo(num - 1) + fibo(num - 2));
+    }
+}
+```
+<img src="">
+
+### 29) Program to calculate average of 5 numbers using function.
+```C
+ /* program to find average of 5 numbers  */
+ 
+#include<stdio.h>
+int avg(int,int,int,int,int);      // prototype
+ 
+int main() { int a1,a2,a3,a4,a5,res;
+   
+   printf("\nEnter the numbers respectiively....");
+   scanf("%d%d%d%d%d",&a1,&a2,&a3,&a4,&a5);
+   
+   res=avg(a1,a2,a3,a4,a5);     // function call
+   printf("Average of the numbers %d",res);
+   
+   return 0; 
+ }
+ 
+ int avg(int a1,int a2,int a3,int a4,int a5)      // definition
+ 
+ { int p; 
+   p=(a1+a2+a3+a4+a5)/5;
+   return p;
+ }
+
+```
+<img src="https://i.imgur.com/Q1q4Ofd.png">
+
+### 30) Program to implement linear search and binary.
+ ```C
+/* Program to implement linear search and Binary search */
+
+#include <stdio.h>
+int main()
+{
+int array[50] ,search,n,c;
+
+printf("enter the number of elements in array\n");
+scanf("%d",&n);
+
+printf("enter %d integer(s) \n",n);
+
+for(c=0;c<n;c++)
+scanf("%d",&array[c]);
+
+printf("enter a number to be searched\n");
+scanf("%d",&search);
+
+for(c=0;c<n;c++)    
+        {
+        if(array[c]==search)
+                {
+                        printf("%d is present at location %d.\n", search ,c+1);
+        break;
+                }
+
+        }
+if(c==n)
+printf("%d isn't present in the array\n",search);
+
+return 0;
+}
+
+```
+<img src="https://i.imgur.com/ANAAACj.png">
+
+### 31) Program to implement binary.
+ ```C
+#include<stdio.h>
+int binarysearch(int arr[],int l,int r,int x)
+{
+        if (r>=1)
+        { int mid=l+(r-1)/2;
+        }
+        if(arr[mid]==x)
+        return mid;
+
+        if (arr[mid]>x)
+        return binarysearch(arr,l,mid-1,x);
+
+        return binarysearch(arr,l,mid-1,x);
+        }
+        
+        return -1;
+ }
+
+        int main(void)
+{
+        int arr[]={2,3,4,10,40};
+        int n=sizeof(arr)/sizeof (arr[0]);
+        int x=10;
+        int result =binarysearch(arr,0,n-1,x);
+        (result==-1); : printf("element is not present");
+                     :printf("element is present at index %d",
+                        result);
+        return 0;
+}
+```
+<img src="https://i.imgur.com/ANAAACj.png">
+
+### 32) Program to implement bubble sort.
+```C
+   /* Bubble sort implementation  */
+ 
+#include <stdio.h>
+ 
+int main()
+{
+  int array[100], n, c, d, swap;
+ 
+  printf("Enter number of elements\n");
+  scanf("%d", &n);
+ 
+  printf("Enter %d integers\n", n);
+ 
+  for (c = 0; c < n; c++)
+    scanf("%d", &array[c]);
+ 
+  for (c = 0 ; c < n - 1; c++)
+  {
+    for (d = 0 ; d < n - c - 1; d++)
+    {
+      if (array[d] > array[d+1]) /* For decreasing order use < */
+      {
+        swap       = array[d];
+        array[d]   = array[d+1];
+        array[d+1] = swap;
+      }
+    }
+  }
+ 
+  printf("Sorted list in ascending order:\n");
+ 
+  for (c = 0; c < n; c++)
+     printf("%d\n", array[c]);
+ 
+  return 0;
+}
+
+```
+<img src="https://i.imgur.com/dvQg0s2.png">
+
+### 33) Program to store information of 10 students using array of structures.
+```C
+/* Structures for student */
+
+#include<stdio.h>
+struct student
+{
+  char name[20],address[30];
+  int grade,roll,dob;
+};
+
+int main()
+{
+  struct student s[10];
+  int i;
+  for(i=0;i<10;i++)
+  {
+    printf("\nEnter records for student[%d]\n",i+1);
+    printf("Enter name: ");
+    gets(s[i].name);
+    printf("Enter address: ");
+    gets(s[i].address);
+    printf("Enter class, roll number and date of birth(year): ");
+    scanf("%d%d%d",&s[i].grade,&s[i].roll,&s[i].dob);
+  }
+  printf("Records of the 10 students are here");
+  for(i=0;i<10;i++)
+  {
+    printf("\nStudent %d",i+1);
+    printf("\nName: %s",s[i].name);
+    printf("\nAddress: %s",s[i].address);
+    printf("\nClass: %d",s[i].grade);
+    printf("\nRoll No.: %d",s[i].roll);
+    printf("\nDOB: %d",s[i].dob);
+    printf("\n");
+  }
+  return 0;
+}
+
+```
+
+<img src="https://i.imgur.com/nxw83jI.png">
+
+### 34) Programs to compute the transpose of a matrix.
+```C
+#include<stdio.h>
+
+int main()
+{
+        int a[10][10],transpose[10][10],r,c,i,j;
+        printf("enter rows and columns of matrix:");
+        scanf("%d%d",&r,&c);
+
+        printf("\n Enter elements of matrix:\n");
+        for(i=0;i<r;++i)
+                for(j=0;j<c;++j)
+                {
+                printf("enter element a%d%d: ",i+1,j+1);
+                scanf("%d",&a[i][j]);
+                }
+
+        printf("\n Entered Matrix: \n");
+        for(i=0;i<r;++i)
+                for(j=0;j<c;++j)
+                 {
+                        printf("%d  ",a[i][j]);
+
+                        if(j==c-1)
+                                printf("\n\n");
+                }
+
+                for(i=0;i<r;++i)
+                        for(j=0;j<c;++j)
+                        {
+                                transpose[j][i]=a[i][j];
+                        }
+
+        printf("\nTranspose of Matrix :\n");
+                for(i=0;i<c;++i)
+                        for(j=0;j<r;++j)
+                        {
+                                printf("%d  ",transpose[i][j]);
+                                if(j==r-1)
+                                        printf("\n\n");
+                        }
+        return 0;               
+}               
+
+
+```
+<img src="https://i.imgur.com/vqnNFuR.png">
+
+### 35) Program to access array using pointer.
+```C
+#include <stdio.h>
+int main()
+{
+   int data[5],i;
+   printf("Enter elements: ");
+   for(i = 0; i < 5; ++i)
+     scanf("%d", data + i);
+   printf("You entered: \n");
+   for(i = 0; i < 5; ++i)
+      printf("%d\n", *(data + i));
+   return 0;
+}
+
+```
+<img src="https://i.imgur.com/9MZAW0G.png">
+
+
 
-Follow instructions give in README.md file, found in respective folder.