I've been trying to do the daily challenges in Unwrap to study but noticed it might be wrong A LOT? Maybe it should just get rid of the questions where it has you write a function from scratch if it doesn't work?

"Write a function that accepts an integer and returns it squared."

Is this not correct? Every time I try these questions where you write it yourself, I submit it, get it marked wrong, copy it into Xcode and it works.

func squareNumber(number: Int) -> Int {
    number * number 
}

Is there some other way you're supposed to do these?

Try putting the return in

func squareNumber(number: Int) -> Int {
    return number * number 
}

The Full Code for Unwrap is on Gihub/twostraws/Unwrap