enum_by_example_04.swift

// You can also map to strings
enum Week: String {
    case Sunday = "Weekday"
    case Monday = "Weekday"
    case Tuesday = "Weekday"
    case Wednessday = "Weekday"
    case Thursday = "Weekday"
    case Friday = "Weekend"
    case Saturday = "Weekend"
}

// You can also map to Int
enum Movement: Int {
    case Left = 0
    case Right = 1
    case Top = 2
    case Bottom = 3
}

// Or to floating point
enum Constants: Double {
    case π = 3.14159
    case e = 2.71828
    case φ = 1.61803398874
    case λ = 1.30357
}