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iOS Functions in Swift Adding Power to Functions Returning Complex Values

Posted by GamingWithHan :)
.a{fill-rule:evenodd;}techdegree
GamingWithHan :)
Java Web Development Techdegree Student 1,966 Points

Returning Complex Values

Hey guys, Could you tell me what is wrong with my code?

Thanks.

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

  if (location = "Eiffel Tower") {
  return coordinates(48.8582, 2.2945)

  } else if (location = "Great Pyramid") {
  return coordinates(29.9792, 31.1344)

  } else if (location = "Sydney Opera House") {
  return coordinates(33.8587, 151.2140)

   } else {
    return coordinates(0.0,0.0)
    }


}

2 Answers

Thomas Dobson
Thomas Dobson
7,511 Points
Thomas Dobson
Thomas Dobson
7,511 Points

Hi Han,

You are pretty close, some some slight changes:

// Enter your code below

//declare your function input as internal string for, external location
//also for the return statement, this Code Challenge wont let you name your tuple
//however note I named mine as well for readability. 
func coordinates(for location: String) -> (Double, Double) {

    if (location == "Eiffel Tower") { //You were setting location to eiffel tower, use the comparative operator as seen here.
        return (48.8582, 2.2945) //remove coordinates. You only want to return the Tuple (in this case the lat, long)

    } else if (location == "Great Pyramid") { //You were setting location to great pyramid, use the comparative operator as seen here.
        return (29.9792, 31.1344) //remove coordinates. You only want to return the Tuple (in this case the lat, long)

    } else if (location == "Sydney Opera House") { //You were setting location to sydney opera house, use the comparative operator as seen here.
        return (33.8587, 151.2140) //remove coordinates. You only want to return the Tuple (in this case the lat, long)

    } else {
        return (0.0,0.0)
    }


}

Also note another way to acomplish this task, which looks a and reads much better using switch a statement

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)
    }
}

I hope this helps

GamingWithHan :)
.a{fill-rule:evenodd;}techdegree
GamingWithHan :)
Java Web Development Techdegree Student 1,966 Points

Thanks so much!

Anthia Tillbury
Anthia Tillbury
3,388 Points
Anthia Tillbury
Anthia Tillbury
3,388 Points

I have this, but it is not accepted. Is this valid:

func coordinates (for location: String) -> (Double, Double) {

    var lat: Double = 0.0
    var lon: Double = 0.0

    switch location {
    case "Eiffel Tower": lat = 48.8582; lon = 2.2945
    case "Great Pyramid": lat = 29.979; lon = 31.1344
    case "Sydney Opera House": lat = 33.8587; lon = 151.2140
    default: 0.0
    }

    return (lat, lon)

}


let eiffelTower = coordinates(for: "Eiffel Tower")

eiffelTower