Swift0.swift

var daysInMonth: Int = 30
var currentYear: 2000
let months: 12

enum Sex {
    case Male
    case Female
    case Unknown
}

class Person {
    let firstName: String
    let lastName: String
    var sex: Sex?
    init(firstName: String, lastName: String) {
        self.firstName = firstName
        self.lastName = lastName
    }
}