Write a program to input a number and check whether it is Sunny Number or not?(24 , 24+1=25 is a perfect square, so 24 is a sunny number)

24)  Write a program to input a number and check whether it is Sunny Number or not?(24 , 24+1=25 is a perfect square, so 24 is a sunny number)

import java.util.*;

public class Sunny_number

{

    public static void main(String args[ ])

    {

        Scanner sc = new Scanner (System.in);

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

        double a = sc.nextInt();

        double p = a+1;

        double b = Math.sqrt(p);

        int c = (int)b;

        if(b==c)

        {

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

        }

        else

        {

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

        } 

    }

}