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C# C# Basics (Retired) Perfect Final

christopher simons
christopher simons
1,651 Points
Posted by christopher simons
christopher simons
1,651 Points

How to I get this catch to work?

I seem to be getting the catch wrong.

Question 1: The " var entry = int.Parse(Console.ReadLine()); " is retrieving the user input (string) and converting/storing it in entry right?

The "try" is telling the program to try the line of code within {} I believe. Within the try is a while loop which works perfect so long as the user input is an int.

When anything other than an int is the user input, I get an exception.

I was thinking "catch(FormatException)" would catch the exception and ignore it.

What am I doing wrong with this thing. I seem to be struggling to hard with this.

Program.cs 
using System;

namespace Treehouse.CodeChallenges{
    class Program{
        static void Main(){
          int counter = 0;
          Console.Write("Enter the number of times to print \"Yay!\": ");
          var entry = int.Parse(Console.ReadLine());
                  try{
                    while(counter != entry)
                      {Console.Write("Yay"); counter = counter + 1;} 
                    }
                    catch(FormatException){
                      Console.WriteLine("That is not valid input.");
                    }    
        }
    }
}

2 Answers

Chris Stowe
Chris Stowe
2,450 Points
Chris Stowe
Chris Stowe
2,450 Points

Try putting "var entry = int.Parse(Console.ReadLine());" inside the try block.

Example:

try
{
  var entry = int.Parse(Console.ReadLine());
}
catch(FormatException)
{
  // Handle the exception.
}
christopher simons
christopher simons
1,651 Points
christopher simons
christopher simons
1,651 Points

Thanks Chris! I had to step away from the computer for a minute so my brain would work right I guess.

christopher simons
christopher simons
1,651 Points
christopher simons
christopher simons
1,651 Points

using System;

namespace Treehouse.CodeChallenges { class Program { static void Main() { try { int counter = 0; Console.Write("Enter the number of times to print \"Yay!\": "); var entry = int.Parse(Console.ReadLine()); if(entry <= 0) { Console.WriteLine("You must enter a positive number.");

                    }
                    else
                    {
                          while(counter != entry)
                        {                      
                          Console.Write("Yay ");
                          counter = counter + 1;
                        }
                    }
              }
              catch(FormatException)
              {
                Console.WriteLine("You must enter a whole number.");
              }
    }
}

}