Swift Fib

gistfile1.txt

struct Fib {
    var current: Int = 1;
    var last: Int = 0;
    mutating func next() {
        
        let tmp = current;
        current += last;
        last = tmp;
        
        print("Current: \(current) Last: \(last) ");
    }
}

var s = Fib()
for _ in 0...20 {
    s.next()
}