lispdoc - results for count-if

(count-if pred sequence &rest args &key from-end (start 0) (end nil) (key nil))
Function: Return the number of elements in SEQUENCE satisfying PRED(el).
Example:
(defun length7 (list) (count-if #'true list))
Mentioned in:
HyperSpec - Function COUNT, COUNT-IF, COUNT-IF-NOT
Successful Lisp - chapter13
(count-if-not pred sequence &rest args &key from-end (start 0) (end nil)
 (key nil))
Function: Return the number of elements in SEQUENCE not satisfying TEST(el).
 Mentioned in:
HyperSpec - Function COUNT, COUNT-IF, COUNT-IF-NOT
Successful Lisp - chapter13