swift fibonacci number

gistfile1.txt

// Playground - noun: a place where people can play
// swift fibonacci number
// Justin Zollars
// jz.io

import Cocoa

var answer = fib(5)

func fib(start: Int) -> Int {
    if start == 0 {
        return start
    }
    if start == 1 {
        return start
    }
        return (fib(start - 1) + fib(start - 2))
}