Fibonacci.swift

var i = 0
func fib(_ number : Int)->Int {
    i += 1
    return number <= 2 ? number : fib(number-1)+fib(number-2)
}

var j = 0
var fibRow = [0, 1, 2]
func fibC(_ number:Int)->Int{
    if number >= fibRow.count {
        fibRow.append(fibC(number-2)+fibC(number-1))
    }
    j += 1
    return fibRow[number]
}

fib(10)
fib(11)
print(i) // 286

fibC(10)
fibC(11)
print(j) // 20