Sum Of All digits in a Number

import java.util.Scanner;

public class sumdigit {

    public static void main(String args[])
    {
        Scanner src=new Scanner(System.in);
        System.out.println("Enter the number");
        int a=src.nextInt();
        int n,sum=0;
        while (a>0)
        {
        n=a%10;
        sum=sum+n;
        a=a/10;
        }
        System.out.println("The sum is "+sum);
    }

}