using System;

​

public class Program

{

    public static void Main()

    {

        bool error = true;

        while (error)

        {

            try

            {

                Console.WriteLine("input a number");

                int num = Convert.ToInt32(Console.ReadLine());

                Console.WriteLine("number " + num);

                error = false;

            }

            catch (FormatException)

            {

                Console.WriteLine("you have to type an integer");

            }

            catch (OverflowException)

            {

                Console.WriteLine("your number was too large");

            }

            catch //used if you think there's more catches you haven't coded for

            {

                Console.WriteLine("nooooo");

            }

        }

    }

}