package sookmas;

import java.util.Scanner;

public class Student {

   public static void main(String[ ] args) {

    int num,i,count=0;

    System.out.println("Enter a number");

    Scanner sc = new Scanner(System.in);

    num= sc. nextInt();

    i=2;

    while(i<=num/2)

    {

     if(num%i==0)

      count++;

     i++;

    }

    if(count==0)

    {

     System.out.println(num+"is a prime number");

    }

    else

     System.out.println(num+"is not a prime number");

 }

} 

take 2 as input