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Task/Monty-Hall-problem/Sidef/monty-hall-problem.sidef

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+var n = 1000;                                 # number of times to play
+var switchWins = (var stayWins = 0);          # sum of each strategy's wins
+
+n.times {                                     # play the game n times
+   var prize = 3.rand.int;
+   var chosen = 3.rand.int;
+
+   var show;
+   do {
+        show = 3.rand.int
+   } while (show ~~ [chosen, prize]);
+
+   given(chosen) {
+     when (prize)                 { stayWins   += 1 }
+     when ([3 - show - prize])    { switchWins += 1 }
+     default                      { die "~ error ~" }
+    }
+}
+
+say ("Staying wins %.2f%% of the time."   % (100.0 * stayWins   / n));
+say ("Switching wins %.2f%% of the time." % (100.0 * switchWins / n));