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C# C# Basics (Retired) Perfect Final

Idan Amar
Idan Amar
798 Points

input validation with try and catch

trying to do the exercise, but the compiler always comes with an error, i dont see any problem here, besides i dont get why you need the try and catch if you can just break when the user enter a non string variable..

Program.cs
using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            string yay = Console.ReadLine();
            if ( yay.GetType() != string ) {
                            Console.Write("You must enter a whole number.");
                break;}
            try {
            int yaytimes = int.Parse(yay);
            while (yaytimes != 0) {
                Console.Write("Yay!");
                yaytimes--;       }
           }
            catch(FormatException)
                {
                    Console.WriteLine("That is not valid input.");
                   continue;
                }

        }
    }
}

1 Answer

Steven Parker
Steven Parker
231,236 Points

The response from Console.Readline is always a string.

So it's not useful to test it for type.

Other issues:

  • you used "Write" where you probably intended "WriteLine"
  • you must use the exact error message(s) given in the instructions
  • you can only use "break" or "continue" inside a loop (plus the program should end after an error)
Idan Amar
Idan Amar
798 Points

ok, thank you for your response, but how can i complere the task if it not useful to test it for type?

Steven Parker
Steven Parker
231,236 Points

Using try and catch are all you need for task 2 of the challenge.