iOS Functions in Swift Adding Power to Functions Returning Complex Values

Cruiz Thomason
Cruiz Thomason
1,085 Points

Help with this Question!!!

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)

I have tried this many ways and can't seem to get it right, seems as though I'm getting further from the solution. Help?

functions.swift
// Enter your code below
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)
    }
}

1 Answer

andren
MOD
andren
Treehouse Moderator 28,275 Points

Your code is incredibly close. Everything inside the function is correct, the only issue is the name and parameter of the function.

The name of the function has to be coordinates, not getTowerCoordinates. And the challenge asks you to create a parameter named location that has an external name of for, you have not added that external name.

If you fix those two issues like this:

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)
    }
}

Then your code will be accepted.