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C# C# Basics (Retired) Perfect Variable Scope

Aly Khedr
Aly Khedr
470 Points

I honestly didnt quite understand the error the video was talking about. Can someone explain it?

all is said

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

Steven Parker
Steven Parker
229,582 Points

There are several errors to be fixed here.

I'm not sure what part of the video you are referring to, but your question links to a challenge where instead of writing code, you fix some that has problems. Things to bear in mind:

  • variables should be declared (and optionally initialized) before they are used
  • variables should be declared only once (but may be assigned multiple times)
  • variables should be declared in the outermost scope in which they are used
  • the Preview button is helpful for showing the compiler error messages