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C# C# Basics (Retired) Perfect Final

Posted by Andrew Perry
Andrew Perry
5,266 Points

C# basics final challenge task 2/3

When I enter this code in workspaces it works but I keep getting the message " oops it looks like the first challenge is no longer passing"

Here is the question: Add input validation to your program by printing “You must enter a whole number.” if the user enters a decimal or something that isn’t a number. Hint: Catch the FormatException.

Can someone please tell me what is wrong with my code?

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 input = Console.ReadLine();
                var redo = int.Parse(input);
                try
                {

                    while (redo >0)
                    {
                        Console.WriteLine("Yay!");
                        redo -=1;
                    }
                }
                catch (FormatException)
                {
                    Console.WriteLine("You must enter a whole number!");
                    continue;
                }
            }
        }
    }
}

5 Answers

Sam Baines
Sam Baines
4,315 Points
Sam Baines
Sam Baines
4,315 Points

Hi Andrew - it quite a challenge this one, mainly because you need to realise that the input is only required to be asked once (which is not clearly stated but thats a different issue) - so you dont need the input to be in the while loop.

I recently passed this challenge with the following code:

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            var entry = 0;

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

                if (entryParsed < 0) {
                    Console.Write("You must enter a positive number.");
                }  
                else 
                {
                    entry += entryParsed;
                }

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

            var x = 0;

            while (true) {

                if (x < entry) {
                    Console.Write("Yay!");
                    x++;
                }
                else
                {
                    break;
                }


            }

        }
    }
}
william williams
william williams
2,912 Points
william williams
william williams
2,912 Points 
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();
        }
    }
}
Patrick Wan
Patrick Wan
685 Points
Patrick Wan
Patrick Wan
685 Points

using System;

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

        try 
        {
            int entry = Int32.Parse(Console.ReadLine());

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

    }
}

}

Nicholas Wallen
Nicholas Wallen
12,278 Points
Nicholas Wallen
Nicholas Wallen
12,278 Points

using System;

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

        try
        {
        int num = int.Parse(entry);

        for (int i=0; i<num; i++) 
            System.Console.WriteLine("\"Yay!\"");
        }
        catch (FormatException)
        {
            Console.WriteLine("You must enter a whole number.");
        }


    }
}

}

kyle miles
seal-mask
.a{fill-rule:evenodd;}techdegree
kyle miles
Full Stack JavaScript Techdegree Student 458 Points
kyle miles
.a{fill-rule:evenodd;}techdegree
kyle miles
Full Stack JavaScript Techdegree Student 458 Points 
using System;

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

            // Checks for input error...
            try
            {
                int count = int.Parse(input);

                if( input > 0 )
                {
                    Console.WriteLine("You must enter a positive number.");
                }
                else
                {
                    int i = 0;
                    while(i < count)
                    {
                        i += 1;   
                        Console.WriteLine("Yay!");
                    }
                }

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

        }
    }
}