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C# C# Basics (Retired) Perfect Variable Scope

Posted by Yashoda Sangapur
Yashoda Sangapur
1,496 Points

I do not understand "The name `output' does not exist in the current context" in the editor ,

What it is I am not doing correct here?

Program.cs 
using System;

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

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

            Console.WriteLine(output);
        }
    }
}

1 Answer

Rune Andreas Nielsen
Rune Andreas Nielsen
5,354 Points
Rune Andreas Nielsen
Rune Andreas Nielsen
5,354 Points

Hi Yoshoda.

You need to make a variable named "output" outside of the scope.

The problem is that you define the "output" variable inside the "if"/"else" scopes, and the variable will be "destroyed" when the scope/if statement is finished, this means you won't be able to access it in the Console.WriteLine(output); On the last line.

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);
        }
    }
}