West Midlands | ITP-Sep-2025 | Ahmad Ehsas | Sprint 2 | Structuring and Testing Data

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,5 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+// line 3 increases the value of count by 1.
+// the "=" operator assigns the  result of "count + 1" back to the variable count.

Sprint-2/1-key-errors/0.js

@@ -9,5 +9,10 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> write your explanation here: when i call the function capitalise with a string input, it shows an error because i am trying to redeclare the variable "str" inside the function, which is already defined as a parameter. this causes a syntax error and we can not redeclare a variable with the same name.
+// =============> write your new code here:  we can not use let str because str is  already the function parameter.
+
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}

Sprint-2/1-key-errors/1.js

@@ -1,20 +1,25 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> write your prediction here: my prediction: The error will occur because i am  trying to redeclare the variable "decimalNumber".//
 
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
+  //const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
+console.log(convertToPercentage(0.5));
 
-// =============> write your explanation here
+// =============> write your explanation here: // the error: identifier `decimalNumber` has already been declared. this error shows that identifier has already been declared and we can not redeclare it again.The identifier `decimalNumber` declared in parameter.//
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+// function convertTopercentage(decimalNumber) {
+// const percentage = `${decimalNumber * 100}%`;
+// return percentage;
+// }
+// console.log(convertTopercentage(0.5));//

Sprint-2/1-key-errors/2.js

@@ -3,18 +3,22 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> write your prediction of the error here: the error might be inside the function "the square number" or might be num is not identified.//
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
+// =============> write the error message here: Uncaught syntaxError: Unexpected number.//
 
-// =============> explain this error message here
+// =============> explain this error message here: This error occurs because the function parameter is not defined correctly. Instead of passing a number directly, we should use a variable name. In this case, we can use "num" as the parameter name.
 
 // Finally, correct the code to fix the problem
 
+
 // =============> write your new code here
+// function square(num) {
+// return num * num;
+// }
 
 

Sprint-2/2-mandatory-debug/0.js

@@ -1,14 +1,18 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> write your prediction here: the value of a and b is not defined in the function and the return statement is missing.//
 
 function multiply(a, b) {
   console.log(a * b);
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// =============> write your explanation here: The code is running but it has technical issue. the multiply function logs the result but does not return it.We need to use return function to use the result inside the string.//
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+//function multiply(a, b) {
+// return a * b;
+//}
+// console.log(`The result of multiplying 10 and  32 is ${multiply(10, 32)}`);

Sprint-2/2-mandatory-debug/1.js

@@ -1,13 +1,16 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> write your prediction here: The return function is not defined, so the function will not return the sum of a and b.
 
 function sum(a, b) {
-  return;
-  a + b;
+  return a + b;
+
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> write your explanation here: in the code above, the function Sum is not returning because the return function is not defined and it is written incorrectly. The return function should be written before the a + b values.//
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+// function sum(a, b) {
+//  return a + b;
+// }

Sprint-2/2-mandatory-debug/2.js

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> Write your prediction here: the function const should write inside the call function.//
 
 const num = 103;
 
@@ -14,11 +14,19 @@ console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
-// =============> write the output here
+// =============> write the output here: The output is 3 for all three calls.
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> write your explanation here: The function getLastDigit is not taking any parameters, so it always uses the outer variable num, which is 103. That's why the output is always 3.
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> write your new code here:
+
+/*function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`); */
 
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem

Sprint-2/3-mandatory-implement/1-bmi.js

@@ -15,5 +15,14 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
+  var bmi = weight / (height * height);
+  var bmis = bmi.toFixed(1);
+  return `Your bmi is ${bmis}`;
+
+  // return the BMI of someone based off their weight and height
+}
+console.log(calculateBMI(85, 1.75));
+// based on the above code: My weight is 85 kg and my height is 1.75m.
+// first i squared my height: 1.75 * 1.75 = 3.0625.
+// then i divided my weight by the squared height: 85 / 3.0625= 27.8
+// so my BMI is `27.8`.

Sprint-2/3-mandatory-implement/2-cases.js

@@ -11,6 +11,17 @@
 
 // Another example: "lord of the rings" should be "LORD_OF_THE_RINGS"
 
+function toUpperSnakeCase(input) {
+  return input.toUpperCase().replace(/ /g, "_");
+}
+
+console.log(toUpperSnakeCase("hello there")); //  "HELLO_THERE"
+console.log(toUpperSnakeCase("lord of the rings")); //  "LORD_OF_THE_RINGS"
+// in the above code, we are using the toUpperCase method to convert the string to uppercase
+// and then using  the replace method to replace spaces with underscores.
+// This is a simple implementation of the function  to convert a string to UPPER_SNAKE_CASE.
+// here replace(/ /g, "_") is used to replace all spaces in the string with underscores.
+
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,15 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+function toPounds(penceString) {
+  const noP = penceString.slice(0, -1);
+  const padded = noP.padStart(3, "0");
+  const pounds = padded.slice(0, -2);
+  const pence = padded.slice(-2).padEnd(2, "0");
+  return `£${pounds}.${pence}`;
+}
+console.log(toPounds("5p")); // £0.05
+console.log(toPounds("70p")); // £0.70
+console.log(toPounds("399p")); // £3.99
+console.log(toPounds("1000p")); // £10.00

Sprint-2/4-mandatory-interpret/time-format.js

@@ -10,25 +10,26 @@ function formatTimeDisplay(seconds) {
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay(61));
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
 
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> write your answer here: When formatTimeDisplay is called three times pad will be called, one for 'remainingSeconds', one for 'remainingMinutes', and one for 'totalHours'.
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
-// =============> write your answer here
+// =============> write your answer here: When pad is called for thee first time, num will be assigned the value of totalHours.
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> write your answer here: The return value of pad when called for the first time will be `pad(totalHours)` for example if the return of 'totalHours' is '1' we will add '0' to make it two digits('01').
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> write your answer here: When pad is called for the last time, num will be assigned the value of 'remainingSecond'.
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> write your answer here: when pad is called for the last time, the return value will be `pad(remainingSecond)`.