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C# C# Basics (Retired) Perfect Final

Posted by Andrej Pajenk
Andrej Pajenk
1,087 Points

Add input to your program by printing "You must enter whole number." if user enters a decimal or something that isn't a

using System;

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

        string entry = Console.ReadLine();
        int minutes = int.Parse(entry);
        bool nadaljujem = true;
        int stevec = 0;

        while(nadaljujem)
          {
          try
          {
          Console.WriteLien(minutes + "This is not valid input");
          }
          catch(FormatException)
{
Console.WriteLine("That is not valid input.");
  continue;
}  
          Console.WriteLine("Yay!");
          stevec = stevec + 1;
          if(stevec != total)
            {
              continue;
            }
          else
            {
              nadaljujem = false;
            }
          }

    }
}

}

Program.cs 
using System;

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

            string entry = Console.ReadLine();
            int minutes = int.Parse(entry);
            bool nadaljujem = true;
            int stevec = 0;

            while(nadaljujem)
              {
              try
              {
              Console.WriteLien(minutes + "This is not valid input");
              }
              catch(FormatException)
    {
    Console.WriteLine("That is not valid input.");
      continue;
    }  
              Console.WriteLine("Yay!");
              stevec = stevec + 1;
              if(stevec != total)
                {
                  continue;
                }
              else
                {
                  nadaljujem = false;
                }
              }

        }
    }
}
Mazen Halawi
Mazen Halawi
7,806 Points
Mazen Halawi
Mazen Halawi
7,806 Points

Hello Andrej, your code looks kinda messy and difficult to read. You have to add a try-catch block before you enter the loop. (see solution below)

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            // Start of Challenge Task 2
            try {
              int numberOfTimes = int.Parse(Console.ReadLine());

              // Start of Challenge Task 3
              if (numberOfTimes >= 0) {
                for (int i=0; i<numberOfTimes; i++) {
                  Console.WriteLine("\"Yay!\"");
                } else {
                  Console.Write("You must enter a positive number.");
                }
              else {}
            } catch (FormatException) {
              Console.Write("You must enter a whole number.");
            }
        }
    }
}

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 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

In addition to the common issues, you also seem to have these:

  • your try block does not enclose int.Parse, which is where the errors are likely to occur
  • you have a method misspelled (Console.WriteLein)