// Ackermann function.  Derived from:
// $Id: ackermann.lua.html,v 1.5 2004/07/03 07:11:33 bfulgham Exp $
// http://www.bagley.org/~doug/shootout/

Ack = ^ M,N {
    if M = 0
	return N + 1
    else if N = 0
	return Ack(M - 1, 1)
    else
        return Ack(M - 1, Ack(M, (N - 1)))
}

Num = 9
Print "Ack(3,", Num, "): ", Ack(3, Num), EoL