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iOS Functions in Swift Adding Power to Functions Returning Complex Values

Mark DeMItchell
Mark DeMItchell
1,527 Points
Posted by Mark DeMItchell
Mark DeMItchell
1,527 Points

Having issues naming local parameter correctly.

Hi :)

Having a difficult time reconciling my code in this challenge to the error I keep receiving. Should I not be assigning an external and internal name in the argument and actually assign the local name as a var inside of the function?

Thanks for your help.

functions.swift 
// Enter your code below
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)
   }
   }

2 Answers

andren
andren
28,558 Points
andren
andren
28,558 Points

The error messages generated by the challenge checker is often a bit misleading. Often it is more helpful to look at the error messages generated by the Swift compiler. Which you can see if you press the "Preview" button after an error has occurred.

The compiler error your code generates is this:

swift_lint.swift:6:44: error: use of undeclared type 'double'
func coordinates(for location: String) -> (double,double) {
                                           ^~~~~~

The error is informing you that it does not recognize double as a type. This is because you have forgotten to capitalize the D in Double. If you fix that typo like this:

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)
   }
}

Then your code will work.

Alphonso Sensley II
Alphonso Sensley II
8,514 Points
Alphonso Sensley II
Alphonso Sensley II
8,514 Points

Hello Mark DeMItchell, Looks like everything is correct! But because Double is a Type, it needs to be capitalized. In the tuple (double, double) Simply switch it to (Double, Double)

Hope that helps!