Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

C# C# Basics (Retired) Perfect Final

Posted by roseleen zhou
roseleen zhou
2,321 Points

c# basics final challenge task 1of2

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 execeptions .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!\": ");
            var entry = Console.ReadLine();

            int counter = 0;
            try
            {
              var total = int.Parse(entry);
             while(total > counter)
            {
              Console.WriteLine("Yay!");
              counter +=1;
             }
             }
            catch(FormatException)
                Console.WriteLine("You must enter a whole number");
        }
          Console.ReadLine();
            }
        }
    }
}

2 Answers

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

It looks like the "catch" block is missing an open brace, and there seems to be one to many closing braces at the end of the program.

Also, that extra "ReadLine" at the end isn't asked for in the instructions.

roseleen zhou
roseleen zhou
2,321 Points

thank you

Brendon Van der nest
Brendon Van der nest
12,826 Points
Brendon Van der nest
Brendon Van der nest
12,826 Points

This is how I did it. if it helps... THEN you know what to do?

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 i = 0;
            try
           {     
                int count = int.Parse(input);

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