import Cocoa let interestingNumbers = [ "Prime": [2, 3, 5, 7, 11, 13], "Fibonacci": [1, 1, 2, 3, 5, 8], "Square": [1, 4, 9, 16, 25], ]; var largest = 0 for (_, numbers) in interestingNumbers { for number in numbers { if number > largest { largest = number // 25 } } } var total = 0 for i in 0..<4 { total += i // 6 }