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C# C# Basics (Retired) Perfect Final

Posted by Andrej Pajenk
Andrej Pajenk
1,087 Points

Add input validation to your program by printing “You must enter a whole number.” if the user enters a decimal or someth

?

Program.cs 
using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            bool KeepGoing = true;
            int counter = 0;
            Console.Write("Enter the number of times to print \"Yay!\": ");
            string entry = Console.ReadLine();
 while(KeepGoing)
 {
   try
   {  
            int minutes = int.Parse(entry);
            Console.WriteLine("Yay!");
              counter = counter + 1;
              if(counter != minutes)
                {
                  continue;
                }
              else
                {
                  KeepGoing = false;
                }
   }
   catch(FormatException)
   {
           Console.Write("You must enter a whole number.");
           entry = Console.ReadLine();
     continue;
   }

 }

        }
    }
}
Mayron van Leenden
Mayron van Leenden
9,979 Points
Mayron van Leenden
Mayron van Leenden
9,979 Points

Hi try this solution: 

class Program
{
      static void Main()
         {

        var counter = 0;

        Console.Write("Enter the number of times to print \"Yay!\": ");
        var input = Console.ReadLine();

        try
        {
            var times = int.Parse(input);

            while (counter < times)
                {
                    Console.Write("Yay!");
                    counter += 1;
                }

         }

        catch (FormatException)
        {
            Console.WriteLine("you must enter a whole number");
        }

        Console.ReadLine();
    }
}

}

2 Answers

Steven Parker
Steven Parker
231,261 Points
Steven Parker
Steven Parker
231,261 Points

People often over-think this one and get too creative, and their answer is rejected for a variety of reasons (some which don't seem to make any sense).

Here are the secret "rules" you must follow for success on this one:

  • Your program must ask for and accept input ONE TIME ONLY
  • If the input validates, your program will perform exactly as in Task 1
  • If the input does not validate, it will print the error message and exit
  • Validation must be done by exception catching. There are other perfectly good methods that can be used for validation, but they will not pass this challenge

:point_right: It looks like your code has a loop that breaks rule 3 (and might run forever if the input is bad).

John Lukacs
John Lukacs
26,806 Points
John Lukacs
John Lukacs
26,806 Points 
using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            string numofTimes= Console.ReadLine();
            try{
            int num =int.Parse(numofTimes);
                 for(var i=0; i<num; i++){
         Console.WriteLine("\"Yay!\"");
            }
                catch(FormatException){
                Console.WriteLine("You must enter a whole number.");
                    continue;



            }
        }
    }
}

why is it still not passing