Online C# Compiler

using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo { class MyApplication { static void Main(string[] args) { int val, result; Calc cal = new Calc(); val = 789; Console.WriteLine("Digit:",val); result = cal.addFunc(val); Console.WriteLine("Sum of Digits in {0} = {1}", val, result); Console.ReadLine(); } } class Calc { public int addFunc(int val) { if (val != 0) { return (val % 10 + addFunc(val / 10)); } else { return 0; } } } }