Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

C# C# Basics If Statements "else if" and "else" Statements

Posted by Ben Perring
Ben Perring
2,383 Points

why does this error occur in my code? as far as i can see it should run

i am pretty sure that this is accurate and my hunch is that the compiler doesn't like something in the else statement.

Program.cs 
using System;

class Program
{

    static string CheckSpeed(double speed)
    {
        if (speed > 65)
        {
            Console.WriteLine("too fast");
        }
        else if (speed < 45)
        {
            Console.WriteLine("too slow");
        }
        else
        {
            Console.WriteLine("speed OK");
        }
    }

    static void Main(string[] args)
    {
        // This should print "too slow".
        Console.WriteLine(CheckSpeed(44));
        // This should print "too fast".
        Console.WriteLine(CheckSpeed(88));
        // This should print "speed OK".
        Console.WriteLine(CheckSpeed(55));
    }

}

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

The "CheckSpeed" method needs to return a string value, it shouldn't call "WriteLine" directly.

For example:

        if (speed > 65)
        {
            return "too fast";
        }