Treehouse gives me a System.ArgumentNullException: value cannot be null. Parameter name: String.

Question

Tried adding:

catch(ArgumentNullException) { Console.WriteLine("Null!); }

but it didn't work.

Program.cs

using System;

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

                try
                {
                    var iEntry = int.Parse(sEntry);

                    if (iEntry > 0)
                    {
                        while (iEntry > 0)
                        {
                            Console.WriteLine("Yay!");
                            iEntry -= 1;
                        }
                    } 
                    else
                    {
                        Console.WriteLine("Negative number!");
                    }   
                }
                catch (FormatException)
                {
                    Console.WriteLine("Not a valid input!");
                    continue;
                }
            }
        }
    }
}

Answer 1 · 2017-05-09T16:51:55Z

May 9, 2017 4:51pm

What input are you giving it? I ran it a few times and didn't get an exception.

Also, the while(true) that surrounds everything will always run your application unless the process is terminated. That may be able to be removed.

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James Hoffman

James Hoffman

Treehouse gives me a System.ArgumentNullException: value cannot be null. Parameter name: String.

1 Answer

Jon Wood

Jon Wood