using System;

public class Program

{

    public static void Main(string[] args)

    {

        int num, sum = 0, r;

        Console.WriteLine("Enter a Number : ");

        num = int.Parse(Console.ReadLine());

        while (num !=0)

        {

            r = num % 10;

            num = num / 10;

            sum = sum + r;

        }

        Console.WriteLine("Sum of Digits of the Number :"+sum);

        Console.ReadLine();

    }

}