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 Swift 2.0 Functions Function Parameters Returning Complex Values

Functions with switch

Wonder why this isn't working? Playground says there is a missing closed curly bracket "}", but there isn't. Also, when I add "Int" next to String, it says there is supposed to be a separator "_:"??? I didn't learn anything about this separator in previous video?

Challenge Task 1 of 1

For this challenge, let's say we're building a component of an app that allows a user to type in a location of a famous landmark and get back the geographical coordinates.

To keep the scope limited, let's say we're only working with the following values.

Eiffel Tower - lat: 48.8582, lon: 2.2945 Great Pyramid - lat: 29.9792, lon: 31.1344 Sydney Opera House - lat: 33.8587, lon: 151.2140

Declare a function named getTowerCoordinates that takes a single parameter of type String, named location, and returns a tuple containing two Double values (Note: You do not have to name the return values)

Use a switch statement to switch on the string passed in to return the right set of coordinate values for the location.

For example, if I use your function and pass in the string "Eiffel Tower" as an argument, I should get (48.8582, 2.2945) as the value.

For the default case in the switch statement, return (0,0).

/Users/mattconway/Desktop/Screen Shot 2016-01-18 at 7.46.11 PM.png

// Enter your code below
func getTowerCoordinates(location: String) -> (Double, Double) {
switch location {
case "Eiffel Tower": (48.8582, 2.2945)
case "Great Pyramid": (29.9792, 31.1344)
case "Sydney Opera House": (33.8587, 151.2140)
default: (0,0)

answer is kinda sorta in your question . 'should return' . Make sure you are explicitly telling the 'case' to return something...

2 Answers

Jari Koopman
.a{fill-rule:evenodd;}techdegree seal-36
Jari Koopman
Python Web Development Techdegree Graduate 29,349 Points

Hi Matt,

The thing you are missing is a single word, instead of returning location between the brackets you should return all of the single locations (the lat and the long) like this:

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)
return (0,0)

I tried this workout in the challenge and it worked absolutely fine. Hope this helped!

Actually, I snapped wrong screenshot. I already had added "return location" between two closing curly brackets. Still an error. Here is the actual screenshot: /Users/mattconway/Desktop/Screen Shot 2016-01-18 at 8.17.49 PM.png

don't see the screen shot