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C# C# Basics (Retired) Perfect Variable Scope

Charles Szvetecz
Charles Szvetecz
1,278 Points
Posted by Charles Szvetecz
Charles Szvetecz
1,278 Points

Need help with Task #1 in the code challenge after the "try" and "catch" module in c# Basic.

I can't seem to correctly answer the code challenge. Can someone please provide correct answer so I can learn and move on with peace of mind.

Program.cs 
using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {            
            input = Console.ReadLine();

            if (input == "quit")
            {
                string output = "Goodbye.";
            }
            else
            {
                string output = "You entered " + input + ".";
            }

            Console.WriteLine(output);
        }
    }
}

1 Answer

Jason Anders
MOD
Jason Anders
Treehouse Moderator 145,860 Points
Jason Anders
Jason Anders
Treehouse Moderator 145,860 Points

Hey Charles,

This challenge is all about "scope" of variables. If a variable is declared inside of a block of code, it cannot be accessed outside that block of code.

But first, you will need to declare the input variable, as it is now, it is just being assigned a value (the user input).

Second you will need to declare an empty output variable once outside of the if/else block. Then inside of the if/else block, remove the declaration and just assign the new value based on the conditional. Remember that variables can be assigned a correct value as many times and in as many places as you want.

And that's all that needs to be refactored. Below is the corrected code for you to review. If it still doesn't make sense, I strongly suggest reviewing scope until it makes sense, because variable scope is extremely important in OOP. 

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {            
            string input = Console.ReadLine();
            string output;

            if (input == "quit")
            {
                output = "Goodbye.";
            }
            else
            {
                output = "You entered " + input + ".";
            }

            Console.WriteLine(output);
        }
    }
}

Keep Coding! :) :dizzy: