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