How do I set up Try-Catch to throw a Format Exception?

Question

Trying to set up a Try-Catch to throw a Format Exception and I'm failing miserably. Just trying to verify the user can only use whole numbers and if not then displays an error message. If someone can at least point me in the right direction or explain what I'm doing wrong, I'd be very appreciative.

Program.cs

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");

            var x = Convert.ToInt32(Console.ReadLine());

            try
            {
                var times = int.Parse(x);
            }
            catch(FormatException)
            {
                Console.WriteLine("You must enter a whole number.");
            }

            for (;x >= 1; x--)
            {
                Console.WriteLine("Yay");
            }   

        }
    }
}

Answer 1 · 2017-06-14T01:39:35Z

June 14, 2017 1:39am

You're actually pretty close. Here's some hints:

you convert your string into a number before the try, but it should be done inside.
int.Parse is for converting strings, but x is already a number
times is assigned but never used (but you don't need it anyway)
FYI: given a string, Convert.ToInt32 does the same thing as int.Parse

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Thomas Strickland

Thomas Strickland

How do I set up Try-Catch to throw a Format Exception?

1 Answer

Steven Parker

Steven Parker

You're actually pretty close. Here's some hints:

Thomas Strickland

Thomas Strickland