added the prime numbers file

prime.java

@@ -0,0 +1,29 @@
+import java.util.*;
+public class prime{
+    public static void main(String args[])
+    {
+        int i,flag=-1;
+        int n;
+        Scanner sc=new Scanner(System.in);
+        System.out.println("enter the number");
+        n=sc.nextInt();
+        if(n==0 ||n==1)
+            System.out.println("the number is neither prime nor composite");
+        else
+            for(i=2;i<n-1;i++)
+            {   if(n%i==0)
+                 {
+                    flag=1;
+                    System.out.println("the number is not a prime number");
+                    break;
+                 }
+
+                else
+                    flag=0;
+            }
+        if(flag==0)
+             System.out.println("the number is a prime number");
+
+
+    }
+}