My basic attempt at a two-up game in Swift. Essentially a copy from the Groovy version found here: http://groovy-lang.org/design-patterns.html#_abstract_factory_pattern

TwoUpGame.swift

class TwoUp {
    private var money = 1000
    
    func tossWasHeads() -> Bool {
        let next = randomNumber()
        return next % 2 == 0
    }
    
    func moreTurns() -> Bool {
        if (money > 0) {
            print("You have \(money), how much would you like to bet?")
            return true
        }
        return false
    }
    
    func play(amount: Int) {
        let coin1 = tossWasHeads()
        let coin2 = tossWasHeads()
        
        if (coin1 && coin2) {
            money += amount
            print("You Win")
        } else if (!coin1 && !coin2) {
            money -= amount
            print("You Lose")
        } else {
            print("Draw")
        }
    }
    
    func randomNumber() -> Int {
        return Int.random(in: 0..<2)
    }
}


let tu = TwoUp()

while(tu.moreTurns()) {
    tu.play(amount: 50)
}
print("Sorry, you have no money left. Thanks for playing!")