Programming in Swift: Functions & Types

Jan 4 2022 · Swift 5.5, iOS 15, Xcode 13

Part 3: Enumerations

24. More Switch Statements

Episode complete

Play next episode

About this episode

Leave a rating/review

See forum comments
Cinema mode Mark complete Download course materials
Previous episode: 23. Switch Statements Next episode: 25. Challenge: Switch Statements

Get immediate access to this and 4,000+ other videos and books.

Take your career further with a Kodeco Personal Plan. With unlimited access to over 40+ books and 4,000+ professional videos in a single subscription, it's simply the best investment you can make in your development career.

Learn more Already a subscriber? Sign in.

Notes: 24. More Switch Statements

Update Notes: This course was originally recorded in 2019. It has been reviewed and all content and materials updated as of October 2021.

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

You’ve seen how easy it is to use a switch statement with enumerations. But what about other types of values? If you find yourself creating long if statements with lots of else clauses, a switch statement might be a better choice. Let’s see what else you can do with switch statements, to help you decide.

func getDescription(for number: Int) -> String {

switch number {
return "No Description"
getDescription(for: 15)
case 0:
  return "Zero"
getDescription(for: 0)
case 1...9:
  return "Between 1 and 9"
getDescription(for: 4)
case let negativeNumber 
case let negativeNumber😺 where negativeNumber < 0:
  return "Negative"
getDescription(for: -52)
42 case _ where number > .max / 2:
  numberDescription = "Very large!"
getDescription(for: Int.max)
let number = Int.max
let numberIsEven: Bool
switch number % 2 {

case 0:
  numberIsEven = true
  numberIsEven = false
func pointCategory(for coordinates: (Double, Double))
func pointCategory(for coordinates: (Double, Double))😺 -> String {

switch coordinates {
  return "No Category"
71 case (0, 0):
  return "Origin"
case (let x, 0):
  return "On the x-axis at \(x)"
case (0, let y):
  reutrn "On the y-axis at \(y)"
pointCategory(for: (0, 0))
pointCategory(for: (50, 0))
pointCategory(for: (0, 3))
case let (x, y):
  return "No zero coordinates. x = \(x), y = \(y)"
pointCategory(for: (-4, 17))
case let (x, y) where y == x * x:
  pointCategory = "Along y = x ^ 2"
pointCategory(for: (2, 4))
😺case (_, let y) where coordinates.0 == y:
  pointCategory = "Along y = x"🛑
case let (x, y) where y == x * x
77 case _ where coordinates.0 == coordinates.1:
  pointCategory = "Along y = x"
pointCategory(for: (6, 6))