Untitled

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

namespace LabPrgm03
{
    class Program
    {
        public static int calc_sum(int number)
        {
            int sum = 0, reminder;
            while (number > 0)
            {
                reminder = number % 10;
                sum = sum + reminder;
                number = number / 10;
            }
            return sum;
        }

        static void Main(string[] args)
        {
            int number, sum;
            Console.Write("Enter a number:");
            number = int.Parse(Console.ReadLine());

            sum = calc_sum(number);

            Console.WriteLine("The sum of the digits of the number{0}is:{1}\n", number, sum);

        }
    }
}