Variable Scope
Where am i getting it wrong

Question

Compiling the below code currently produces the error: "The name 'output' does not exist in the current context". This error is the result of improper variable scoping.
The output variable is declared twice: once within the if statement's curly braces and again within the else statement's curly braces. Remember, variables in C# can only be used within the curly braces that they are declared within. The last line of code in this program, Console.WriteLine(output);, is attempting to use a variable named output, which doesn't exist outside of the if/else statement's curly braces.
To fix this error:
    Declare the output variable just before the if statement and assign it to an empty string (i.e. "").
    Remove the string data types from the output variables within the if/else statement's curly braces
My Answer
using System;
namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {            
             string input = Console.ReadLine();
            if (input == "quit")
            {
                 output = "Goodbye.";
            }
        string output = Console.ReadLine();

if
        {
             output = "You entered " + input + ".";

}
        Console.WriteLine(output);
    }
}
}
```Program.cs
using System;
namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {            
             string input = Console.ReadLine();
            if (input == "quit")
            {
                 output = "Goodbye.";
            }
        string output = Console.ReadLine();

if
        {
             output = "You entered " + input + ".";

}
        Console.WriteLine(output);
    }
}
}
```

Tim Strand · Answer

You declared output midway down in the program. Just declare it as a string at the top of the program and get rid of the declaration inbetween the 2 ifs. then make them an if else statement instead.
```c#
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);
    }
}
}
```

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Winston Kaseke

Winston Kaseke

Variable Scope Where am i getting it wrong

1 Answer

Tim Strand

Tim Strand

Winston Kaseke

Winston Kaseke