SWEA 2058 자릿수 더하기 D1 (자바 Java)

import java.util.Scanner;
import java.io.FileInputStream;
 
class Solution
{
    public static void main(String args[]) throws Exception
    {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int sum = 0;
 
        while (N > 0) {
            sum += N % 10;
            N /= 10;
        }
        System.out.println(sum);
    }
}