Prime Number

Program -

import java.util.*;

public class Prime
{
    public static void main(String[] args)
    {
        int n = 49;
        boolean prime = true;
        for(int i = 2; i < n; i++)
        {
            if(n % i == 0)
            {
                prime = false;
                break;
            }
        }
        System.out.println(prime);
    }
   
}

Video explanation -