enum_raw.swift

enum Weekday: Int {
    case sun
    case mon
    case tue
    case wed
    case thur
    case fri
    case sat
    
    var value: String {
        switch self {
        case .sun:
            return "sun"
        case .mon:
            return "mon"
        case .tue:
            return "tue"
        case .wed:
            return "wed"
        case .thur:
            return "thur"
        case .fri:
            return "fri"
        case .sat:
            return "sat"
        }
    }
}

let dayNumber = 1
let weekday = Weekday(rawValue: dayNumber)
print("weekday name: \(weekday.value)")