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

Posted by salih topcu
salih topcu
779 Points

Help me plz.

In this challenge, we have the following geographical coordinates

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 coordinates that takes a single parameter of type String, with an external name for, a local name of location, and returns a tuple containing two Double values (Note: You do not have to name the return values). 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. If a string is passed in that doesn’t match the set above, return (0,0)

functions.swift 
// Enter your code below

1 Answer

Luis avila
Luis avila
1,609 Points
Luis avila
Luis avila
1,609 Points

Hi, this was my solution and it was accepted after submitting:

```func getTowerCoordinates(location: String) -> (Double, Double) {

var lat: Double = 0.0, lon: Double = 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;  lon = 151.2140
default: return (0,0)
}

return (lat, lon) }```

switch statements, you're taking a variable and comparing the value against multiple cases within the closure. If the value matches up with a specific case, the code following that case is executed and the application breaks out of that switch statement. If the value doesn't match up with a specific case, the default case's code is executed and the application breaks out of that switch statement.