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iOS Swift 2.0 Functions Function Parameters Returning Complex Values

Haitham Alam
Haitham Alam
2,685 Points
Posted by Haitham Alam
Haitham Alam
2,685 Points

answer

can i have the answer plz?

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

    switch  {
    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: "0,0"
    }

    return (lat, lon)
}

3 Answers

jcorum
jcorum
71,830 Points

The basic rule about return statements is that you need one for each "path". In switch statements each case (and the default) is a path. In an if... else if... else... statement there would be 3 paths. If it were if... else if... else if... else if... else there would be 4 paths. In short, if there are n possible outcomes, then there are n paths.

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Close! But you need a return statement for each path in the switch statement, not just one at the end:

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

    switch  location {
    case "Eiffel Tower":  
      return (lat: 48.8582, lon: 2.2945)
    case "Great Pyramid":  
      return (lat: 29.9792, lon: 31.1344)
    case "Sydney Opera House":
      return (lat: 33.8587, lon: 151.2140)
    default: 
      return (0,0)
    }

}
Haitham Alam
Haitham Alam
2,685 Points
Haitham Alam
Haitham Alam
2,685 Points

Thank you, but why do i need to return each case and not only one ??