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iOS Functions in Swift Adding Power to Functions Returning Complex Values

Posted by Justus Aberson
Justus Aberson
1,035 Points

Can anyone help me out?

Hey guys, I was working on this question, and I just can't figure it out, I know it has something to deal with the print behind the cases, that I wrote. I just don't know how I can let it return to double, double. I hope someone can help me out! Thanks.

functions.swift 
// Enter your code below
func coordinates(for location: String) -> (Double, Double) {


    switch location {

    case "Eiffel Tower": print(48.8582, 2.2945)
    case "Great Pyramid": print(29.9792, 31.1344)
    case "Sydney Opera House": print(33.8587, 151.2140)
    default: print(0,0)

    }

return ??

}
Justus Aberson
Justus Aberson
1,035 Points

Btw, if you want to help me out, can you please not paste the right answer in? :P, but can you please send me a bit into the right direction? I really want to figure it out myself!

2 Answers

andren
andren
28,558 Points
andren
andren
28,558 Points

Your code is so close to being correct that giving you any real advice without straight out giving you the answer is actually pretty though. The thing I'll say is that the when the challenges states that it wants double, double returned it means that it wants the value you are currently printing returned. For example if the function was called with "Eiffel Tower" the challenge expects the exact value (48.8582, 2.2945) to be returned.

If you still want more specific advice just ask me.

Justus Aberson
Justus Aberson
1,035 Points

Thanks for your reply! I still haven't figured it out so can you please say the answer? Thank you!!

andren
andren
28,558 Points
andren
andren
28,558 Points

Sure, though I did try to give you a bit of a hint when I said "it wants the value you are currently printing returned", the hint being that simply changing your print statements to return statements would actually be all that was needed to complete the challenge.

func coordinates(for location: String) -> (Double, Double) {


    switch location {

    case "Eiffel Tower": return(48.8582, 2.2945)
    case "Great Pyramid": return(29.9792, 31.1344)
    case "Sydney Opera House": return(33.8587, 151.2140)
    default: return(0,0)

    }
}

While a function usually only has one return statement, having multiple ones is fine as long as there is some conditional logic that make it so that only one of them is executed when the function runs. The action performed by a switch case check is not limited to printing out a value, pretty much any single line expression can be executed, including return statements as you can see above.

Justus Aberson
Justus Aberson
1,035 Points
Justus Aberson
Justus Aberson
1,035 Points

Ahhh, I thought you could only have one return statement in a function, thanks a lot for helping me out!!