Data commit

Task/Monty-Hall-problem/Swift/monty-hall-problem.swift

@@ -0,0 +1,23 @@
+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")