Introduction
I have used Visual Studio 2012 for debugging purpose. But you can use any version of visul studio as per your availability..
using System; using System.Collections.Generic; using System.Linq; using System.Text; public class csharpExercise { static void Main(string[] args) { int num, sum = 0, firstDigit, lastDigit; // Reading number Console.Write("Enter any number: "); num = Convert.ToInt32(Console.ReadLine()); lastDigit = num % 10; firstDigit = num; while (num >= 10) { num = num / 10; } firstDigit = num; //Finding sum of first and last digit sum = firstDigit + lastDigit; Console.WriteLine("Sum of first and last digit: "+ sum); Console.ReadLine(); } }