Monty Hall problem: Difference between revisions

=={{header|Swift}}==

<lang swift>import Foundation

func montyHall(doors: Int = 3, guess: Int, switch: Bool) -> Bool {

guard doors > 2, guess > 0, guess <= doors else { fatalError() }

let winningDoor = Int.random(in: 1...doors)

return winningDoor == guess ? !`switch` : `switch`

}

var switchResults = [Bool]()

for _ in 0..<1_000 {

let guess = Int.random(in: 1...3)

let wasRight = montyHall(guess: guess, switch: true)

switchResults.append(wasRight)

}

let switchWins = switchResults.filter({ $0 }).count

print("Switching would've won \((Double(switchWins) / Double(switchResults.count)) * 100)% of games")

print("Not switching would've won \(((Double(switchResults.count - switchWins)) / Double(switchResults.count)) * 100)% of games")</lang>

{{out}}

<pre>Switching would've won 66.8% of games

Not switching would've won 33.2% of games</pre>