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C# C# Basics (Retired) Perfect Final

Assist on use of if/else in input validation.

Add more input validation to the program by printing "You must enter a positive number." if the user enters a negative number.

Add an if/else conditional statement just after parsing the user's provided input to an integer

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 < 1)

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

        else
        {
            int i = 0;
            while(i < count)
            {
                i += 1;   
                Console.WriteLine("Yay!");
            }
            }
             catch (FormatException) 
             { 
                 Console.WriteLine("You must enter a whole number");
             }

        }
    }
}

1 Answer

Steven Parker
Steven Parker
216,136 Points

I see two issues:

  • on line 15 a number is being compared with "input" (a string) instead of "count"
  • the "try" block is missing an ending brace, add another "}" before the "catch"

Remember to use the "preview" button, the compiler messages can often help you find errors.