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C# C# Basics (Retired) Perfect Final

Posted by Winston Kaseke
Winston Kaseke
874 Points

try and catch where to input them

Add input validation to the below program by printing "You must enter a whole number." if the user enters a decimal or something that isn’t a number.

Wrap all of the code contained in the Main method in a try/catch block
The catch block should catch FormatException exceptions
Inside of the catch block, output to the console the message "You must enter a whole number."
Program.cs 
using System;

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

            int count = int.Parse(input);

            int i = 0;
            while(i < count)
            {
                i += 1;   
                Console.WriteLine("Yay!");
            }
            catch(FormatException)
            {
             Console.Write("You must enter a whole number")
            }
        }
    }
}

1 Answer

Robert Stefanic
Robert Stefanic
35,170 Points
Robert Stefanic
Robert Stefanic
35,170 Points

You have the catch part, but it a try{} block needs to come before the catch block, just like an else statement can only appear after an if statement.

Example:

try 
{

// My code

}
catch (Exception e) 
{
  // What to do if an error occurs
}