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

Tojo Alex
PLUS
Tojo Alex
Courses Plus Student 13,331 Points
Posted by Tojo Alex
Tojo Alex
Courses Plus Student 13,331 Points

i'm not really sure what to put in the if statement

Its asking me these 3 things : 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." I don't know what to put in the if statement if you want the user to enter positive numbers only

Program.cs 
using System;

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

                 int count = int.Parse(input);

                if (input )
                {



                }else{



                }

                 int i = 0;
                 while(i < count)
                 {
                     i += 1;   
                     Console.WriteLine("Yay!");
                 }

            } catch(FormatException e) {

                 Console.WriteLine("You must enter a whole number.");
            }
        }
    }
}

4 Answers

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

Here's a few hints:

  • it might be hard to test the string ("input)", but testing the number ("count") should be easier
  • negative numbers are less than 0 ("< 0")
  • if the number is negative you will issue the message
  • you don't need to worry about "else" since the loop won't start
Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

Perhaps you were thinking of a different challenge.

Allan Clark
Allan Clark
10,810 Points
Allan Clark
Allan Clark
10,810 Points

Instead of 'input' (a string) use the parsed int 'count'. count > 0

Allan Clark
Allan Clark
10,810 Points
Allan Clark
Allan Clark
10,810 Points

happens to the best of us :)

for future reference to tell if a number is even/odd you would need to use the modulo operator (%). this gives the remainder portion of simple division. for example:

count % 2 == 0 if this evaluates to true the number is even if not its odd.