RosettaCodeData/Task/Ackermann-function/Emacs-Lisp/ackermann-function.l

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2019-09-12 10:33:56 -07:00
(defun ackermann (m n)
(cond ((zerop m) (1+ n))
((zerop n) (ackermann (1- m) 1))
(t (ackermann (1- m)
(ackermann m (1- n))))))