Fizz Buzz

fizzbuzz.swift

func fizzBuzz (size: Int) {
    
    // An array can be declared like this
   var list: Array<Int> = []
    
    // Alternatively, you can instantiate:
    // var list = [Int]()
    
    // This array creation is oddly slow in Playgrounds (try it with size: 400).
    // Then again, I shouldn't need *two* loops for a fizzbuzz.
    
    var i = 1
    while (i <= size) {
        list.append(i)
        i += 1
    }
    
    // List iteration:
    for val in list {
        var output: String = ""
        
        // Doing each comparison only once
        let fizz = (val % 3 == 0)
        let buzz = (val % 5 == 0)
        
        // Convert an Int into a String explicitly
        if (!fizz && !buzz) { output = String(val) }
        
        // Implicitly, by escaping `val` in a composed string:
        // output = "\(val)"
        
        if (fizz) { output.append("fizz")}
        if (buzz) { output.append("buzz")}
        print(output)
    }
}

fizzBuzz(size:100) // Or whatever