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C# C# Basics (Retired) Perfect Final

Matthew McPhail
Matthew McPhail
2,173 Points
Posted by Matthew McPhail
Matthew McPhail
2,173 Points

This program works in the workspace, but does not work here. I'm not sure if I'm missing something

I get a compilation error with this code. This has me quite frustrated, I'm not sure if you had the wrong idea in mind when asking to use a try and catch.

Program.cs 
using System;

namespace Treehouse.CodeChallenges
{
class Program
{
    static void Main()
    {
        while(true)
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            var times = Console.ReadLine();
            try
            {
                var repeat = int.Parse(times);
                while(repeat > 0)
                {
                    Console.WriteLine("Yay!");
                    repeat --;
                }
            }
            catch(FormatException)
            {
                Console.WriteLine("You must enter a whole number.");
                continue;
            }
        }

    }
}
}

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

You have an outer loop that prevents the program from ending.

A program built according to the instructions will prompt and accept input one time, and based on the input it will either print "Yay!"s or an error message. Either way, it should end. With the extra loop it never ends.

Matthew McPhail
Matthew McPhail
2,173 Points
Matthew McPhail
Matthew McPhail
2,173 Points

I'm not sure I get it though. The parse needs to be checked within the catch right? But we need the parse information to start a loop. And I think a catch needs to be tested within a loop from what I can gather... maybe I'm still a little confused.

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

"try...catch" functionality is not related to loops. It can be used inside them or outside them as the conditions require.

And the parse needs to be done inside the try. So it makes sense to place the try (and the parse) before the loop (or around it).

Matthew McPhail
Matthew McPhail
2,173 Points
Matthew McPhail
Matthew McPhail
2,173 Points

I've figured it out, thanks for your help!