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# 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")

}
```

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.

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