For loop

1.       Write a Program in Java to input a number and check whether it is a Pronic Number or Heteromecic Number or not.
       2, 6, 12, 20, 30, 42, 56, 72, 90

import java.util.*;

class PronicNumber

{

    public static void main(String args[])

    {

        Scanner sc = new Scanner(System.in);   

        System.out.print("Enter a number : ");

        int n = sc.nextInt();

        int flag = 0;

        for(int i=0; i<n; i++)

        {

            if(i*(i+1) == n)

            {

                flag = 1;

                break;

            }

        }

        

        if(flag == 1)

            System.out.println(n+" is a Pronic Number.");

        else

            System.out.println(n+" is not a Pronic Number.");     

    }

}

Output : Enter a number : 7

  73 is not a Pronic Number.