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iOS Swift 2.0 Functions Function Parameters Returning Complex Values

Posted by Corey Hellwege
Corey Hellwege
3,863 Points

Swift Functions Code Challenge - Having trouble writing a function with a switch statement

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).

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)
    }

}

getTowerCoordinates(Eiffel Tower)

2 Answers

Steven Deutsch
Steven Deutsch
21,046 Points
Steven Deutsch
Steven Deutsch
21,046 Points

Hey Corey Hellwege,

You almost have it! Just a simple fix, you need to pass Eiffel Tower in as a String to your getTowerCoordinates function. Just wrap it in quotation marks and problem solved!

// 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)
    }

}

// The problem is you're not passing a string to your function
getTowerCoordinates("Eiffel Tower")

Good Luck!

Corey Hellwege
Corey Hellwege
3,863 Points

Oh, so simple! Thanks very much Steven.