Data update

Task/Factorial/Emacs-Lisp/factorial-1.l

@@ -1,11 +0,0 @@
-;; Functional (most elegant and best suited to Lisp dialects):
-(defun fact (n)
-  "Return the factorial of integer N, which require to be positive or 0."
-  ;; Elisp won't do any type checking automatically, so
-  ;; good practice would be doing that ourselves:
-  (if (not (and (integerp n) (>= n 0)))
-      (error "Function fact (N): Not a natural number or 0: %S" n))
-  ;; But the actual code is very short:
-  (apply '* (number-sequence 1 n)))
-  ;; (For N = 0, number-sequence returns the empty list, resp. nil,
-  ;; and the * function works with zero arguments, returning 1.)

Task/Factorial/Emacs-Lisp/factorial-2.l

@@ -1,8 +0,0 @@
-;; Recursive:
-(defun fact (n)
-  "Return the factorial of integer N, which require to be positive or 0."
-  (if (not (and (integerp n) (>= n 0))) ; see above
-      (error "Function fact (N): Not a natural number or 0: %S" n))
-  (cond ; (or use an (if ...) with an else part)
-   ((or (= n 0) (= n 1)) 1)
-    (t (* n (fact (1- n))))))

Task/Factorial/Emacs-Lisp/factorial-3.l

@@ -1,4 +0,0 @@
-(require 'calc)
-(calc-eval "fact(30)")
-=>
-"265252859812191058636308480000000"