Prime number

a. prime or not
Prime number: A prime number is a whole number greater than 1 whose only factors are 1 and itself.
Ans:
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public class PrimeTest {
public static void main(String[] args) {
int n, i, k=0;
            System.out.println("Enter a positive integer: ");
            Scanner sc = new Scanner(System.in);
            n=sc.nextInt();
            for(i=2;i<=n/2;++i){
                 if(n%i==0){
                       k=1;
                       break;
                 }
             }
             if (k==0)
                  System.out.println(n+" is a prime number");
             else {
                 System.out.println(n+" is not a prime number");
              }
              sc.close();
}
}
Output:
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Enter a positive integer: 29
29 is a prime number.