2.2. Sum_Digits

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _2._2.Sum_Digits
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());

            int totalNum = 0;

            while (num != 0)
            {
                totalNum = totalNum + num % 10;
                num =  num / 10;
            }

            Console.WriteLine(totalNum);
        }
    }
}