Swift Basics - Enumerations

Enumerations

They can contain strings, characters, integers, or floating points.

To define an enumeration:

enum DaysOfWeek

{

  case Monday

  case Tuesday

  case Wednesday

}

OR

enum DaysOfWeek

{

  case Monday, Tuesday, Wednesday

 case Thursday, Friday, Saturday, Sunday

}

We can assign an enumeration value to a variable:

var today = DaysOfWeek.Saturday

We can use it with a switch case:

switch today

{

 case .Monday: print("Monday")

 case .Tuesday: print("Tuesday")

 default: print("Another day")

}

We can also populate enumerations with raw values

enum MyFavs: String

{

 case musicGenre = "Rock"

 case movie = "Shindler's List"

 case song = "Vindicated"

}

print("My fav song is : \(MyFavs.song.rawValue)")

We can assign numbers:

enum Months: Int 

{

 case January = 1

 case February= 2

}

print("The month January is month number \(Months.January.rawValue)")

We can assign more than one value to each case of an enumeration:

enum Food

{

 case Pizza(Double, Int, Int)

 case chickenRice(Double, Int)

}

var thisPizza = Food.Pizza(436.24, 1, 2)

switch thisPizza

{

  case .Pizza(let calories, let servings, let slices)

 print("Calories: \(calories)")

}