# Programming in Swift: Functions & Types

Jan 4 2022 Swift 5.5, iOS 15, Xcode 13

## Part 3: Enumerations

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

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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 {

}
``````
``````break
``````
``````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
``````
``````default:
numberIsEven = false
``````
``````func pointCategory(for coordinates: (Double, Double))
``````
``````func pointCategory(for coordinates: (Double, Double))😺 -> String {

}
``````
``````switch coordinates {
default:
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))
``````