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

iOS Functions in Swift Adding Power to Functions Returning Complex Values

please help me to correct my problem ..

please help me to correct this problem .. thank you

// Enter your code below
func coordinates(location : String) -> ( lat:Double ,  lon:Double ){

    var lat = 0.0
    var lon = 0.0

    switch location {
    case "Eiffel Tower":
       lat = 48.8582
        lon = 2.2945
    case "Great Pyramid":
        lat = 29.9792
        lon = 31.1344
        case "Sydney Opera House":
            lat = 33.8587
            long1 = 151.2140
        lat = 0.0
        lon = 0.0

    return (lat,lon)

1 Answer


I copied and pasted your code to find the error, and I found some ways to simplify your code. The first thing I changed was the return type, taking out the names "lat" and "lon." For this purpose, we only need the return types, not names. Also, in the case of the Sydney Opera House, you used "long1" which the compiler doesn't recognize. Here is what I got:

func getTowerCoordinates(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)

If you have any questions, feel free to ask.