9 lines
228 B
Text
9 lines
228 B
Text
|
(deffunction factorial (?a)
|
||
|
|
(if (or (not (integerp ?a)) (< ?a 0)) then
|
||
|
|
(printout t "Factorial Error!" crlf)
|
||
|
|
else
|
||
|
|
(if (= ?a 0) then
|
||
|
|
1
|
||
|
|
else
|
||
|
|
(* ?a (factorial (- ?a 1))))))
|