Magic Number Program in Java

Magic number is the if the sum of its digits recursively are calculated till a single digit If the single digit is 1 then the number is a magic number. Magic number is very similar with Happy Number.

Example- 226 is said to be a magic number

2+2+6=10 sum of digits is 10 then again 1+0=1 now we get a single digit number is 1.if we single digit number will now 1 them it would not a magic number.

import java.util.Scanner;

public class MagicNumber
{
    public static void main(String[] args)
    {
        int n, r = 1, num, sum = 0;
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter number=");
        n = sc.nextInt();
        num = n;
        while (num > 9)
        {
            while (num > 0)
            {
                r = num % 10;
                sum = sum + r;
                num = num / 10;
            }
            num = sum;
            sum = 0;
        }
        if (num == 1)
        {
            System.out.println("Magic Number");
        }
        else
        {
            System.out.println("Not Magic Number");
        }
    }
}

Output:

Enter number=226
Magic Number