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# Objects Encapsulation and Arrays Ternary If

Posted by Scott Upstell
Scott Upstell
3,428 Points

Did you include the boolean expression to evaluate?

I copied the exact method that the video on this used to convert the if statement to a Ternary If statement, and i keep getting this error:

"Did you include the boolean expression to evaluate"

The problem for this code doesn't state any sort of boolean statements or evaluation, and I have no idea how to fix this code.

CodeChallenge.cs 
int value = -1;
string textColor = null;

//if (value < 0)
//{
//    textColor = "red";
//}
//else
//{
//    textColor = "green";
//}

return (value < 0) ? (textColor = "red") : textColor = "green";

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

The way ternaries are typically used (and as shown in the video) is to evaluate an expression and return one of two values. The entire ternary can then be the right-hand side of an assignment. Check the video example again.

Controlling statement execution (like two different assignments) is better done with "if".

And "return" can only be used inside a function.