swiftlyfox/SwiftyFox.playground/Contents.swift

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
}