iOS Functions in Swift Adding Power to Functions Function Scope

Michael Dean
Michael Dean
821 Points

Double Double is producing errors in playgrounds and not accepted in challenge

I'm not sure why this doesn't work. I'm getting two warnings: Line one I get "All paths through this function will call itself" Line two I get "Variable 'locationCoordinates' was written to, but never read"

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

    var locationCoordinates: (Double, Double)

    switch location {

    case "Eiffel Tower": locationCoordinates = (48.8582, 2.2945)

    case "Great Pyramid": locationCoordinates = (29.9792, 31.1344)

    case "Sydney Opera House": locationCoordinates = (33.8587, 151.2140)

    default: locationCoordinates = (0, 0)

    }
    return coordinates(for: "Eiffel Tower")

}

2 Answers

Jhoan Arango
MOD
Jhoan Arango
Treehouse Moderator 12,812 Points

Hello,

You are using the function within its own body. The return should be the variable that you are assigning values to in the switch cases.

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

    var locationCoordinates: (Double, Double)

    switch location {

    case "Eiffel Tower": locationCoordinates = (48.8582, 2.2945)

    case "Great Pyramid": locationCoordinates = (29.9792, 31.1344)

    case "Sydney Opera House": locationCoordinates = (33.8587, 151.2140)

    default: locationCoordinates = (0, 0)

    }
    return locationCoordinates

}

Hope this helps.

Michael Dean
Michael Dean
821 Points

Thank you Jhoan ... yes that worked. Now I understand what I need to do with the return.