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C#

Can someone explain to me why my program wouldn't catch the exception?

I'm on the final code challenge for C# and I followed along no problem with the class. When I got to the end though I was having problems with the code compiling. I don't know if it was just the work spaces or what but I write all my code in Visual Studio and then just copy and paste it in.

But my main problem is that I can't get the program to catch my exception. It catches it after it crashes, but won't in the program. I can type in how every many "Yays" I want and it prints them and ends the program, but won't throw an exception when I input something besides an Int. Here is my code:

class Program {

    static void Main(string[] args)
    {


        var looped = 0;



        Console.Write("Enter the number of times to print \"Yay!\": ");
        var entry = Console.ReadLine();
        var times = int.Parse(entry);

            while (looped < times)
            {

                try
                {
                    Console.WriteLine("Yay!");
                    looped += 1;
                    continue;
                }

                catch (FormatException)
                {
                    Console.WriteLine("You must enter a whole number.");
                    continue;
                }
            }

        Console.ReadLine();
    }
}

}

P.S: I left out the namespace part at the top, as well as the using system.

1 Answer

Steven Parker
Steven Parker
231,236 Points

Your structure is not quite correct. The purpose of the try and catch is to validate that the input is a number, so for it to do that the try block must enclose the line where you call int.Parse (and not be inside the loop). Some other things to keep in mind are:

  • Your program must ask for and accept input ONE TIME ONLY (so only one Readline)
  • If the input validates, your program will perform exactly as in Task 1
  • If the input does not validate, it will print the error message and exit
  • since the parsing will be inside the try, the times variable must be declared separately from the assignment