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iOS Functions in Swift Adding Power to Functions Returning Complex Values

Napatchol Thaipanich
PLUS
Napatchol Thaipanich
Courses Plus Student 13,534 Points

how it do this challenge

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)

functions.swift
// Enter your code below
func coordinates (for location : String) -> (lat : Double, lon : Double){
  var lat = 0.0
  var lon = 0.0
  switch location{
    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 :
      lat =  0.0
      lon =  0.0
  }
  return (lat , lon)
}

var loc = coordinates (for : "Eiffel Tower")
loc.lat
loc.lon

5 Answers

John Roque Jorillo
John Roque Jorillo
13,117 Points

In the challenge it is mention that -> (Note: You do not have to name the return values) just remove the names of the return values.

// Enter your code below func coordinates (for location : String) -> (Double, Double){ var lat = 0.0 var lon = 0.0 switch location{ 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 : lat = 0.0 lon = 0.0 } return (lat , lon) }

var loc = coordinates (for : "Eiffel Tower")

Marilyn Magnusen
Marilyn Magnusen
14,084 Points

This is just passed for me:

// Enter your code below

 func coordinates (for location : String) -> (Double, Double) { 
 var lat = 0.0 
 var lon = 0.0 

 switch location{ 
 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 : 
 lat = 0.0 
 lon = 0.0 } 
 return (lat , lon) }

var loc = coordinates (for : "Eiffel Tower")
codyl
codyl
4,704 Points

This seems cleaner (and just passed for me):

func coordinates(for location: String) -> (Double, Double) {
  var lat = 0.0
  var lon = 0.0
  switch location {
    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: lat = 0.0; lon = 0.0
  }
  return (lat, lon)
}

I did the same thing. I had to look up the semicolon also for this one.

I do not recall semicolons being mentioned in the videos.

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

var lat: Double = 0.0
var lon: Double = 0.0

switch location {
case "Eiffel Tower":
    (lat, lon) = (48.8582, 2.2945)
case "Great Pyramid":
    (lat, lon) = (29.9792, 31.1344)
case "Sydney Opera House":
    (lat, lon) = (33.8587, 151.2140)
default:
    (lat, lon) = (0.0, 0.0)
}
return (lat, lon)

}