fn fib(int n) -> int {
    if n < 2 {
        return n
    }
    return fib(n - 1) + fib(n - 2)
}

fn later() -> int {
    return defined_below()
}

fn defined_below() -> int {
    return 42
}

fn greet(str who) {
    if who == "" {
        return
    }
    print("hi", who)
}

fn main() {
    print(fib(20))
    print(later())
    greet("")
    greet("finch")
}