Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Functions in Swift Adding Power to Functions Returning Complex Values

Posted by perpetual makayi
perpetual makayi
8,441 Points

functions in swift 3

Challenge Task 1 of 1

In this challenge, we have the following geographical coordinates

Eiffel Tower - lat: 48.8582, lon: 2.2945 Great Pyramid - lat: 29.9792, lon: 31.1344 Sydney Opera House - lat: 33.8587, lon: 151.2140

Declare a function named coordinates that takes a single parameter of type String, with an external name for, a local name of location, and returns a tuple containing two Double values (Note: You do not have to name the return values). For example, if I use your function and pass in the string "Eiffel Tower" as an argument, I should get (48.8582, 2.2945) as the value. If a string is passed in that doesn’t match the set above, return (0,0)

Bummer! Make sure your function is named coordinates

functions.swift

func getTowerCoordinates(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)

}

} im stuck gain

functions.swift 
func getTowerCoordinates(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

Jeff McDivitt
Jeff McDivitt
23,970 Points
Jeff McDivitt
Jeff McDivitt
23,970 Points

You forgot the external name for

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)
    }
}
Brent McCoy
PLUS
Brent McCoy
Courses Plus Student 31,764 Points
Brent McCoy
Brent McCoy
Courses Plus Student 31,764 Points

Just a couple of small things - you have named the function wrong (should be just "coordinates") and left out the external argument name (which should be "for"):

// 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)
  }
}