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C# C# Basics (Retired) Perfect Final

Tojo Alex
PLUS
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
229,005 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
229,005 Points

Perhaps you were thinking of a different challenge.

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

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.