lispdoc - results for integerp

(integerp object)
Function: Return true if OBJECT is an INTEGER, and NIL otherwise.
Example:
(defun day (number)
  (and (integerp number) (<= 1 number 31)))
Mentioned in:
CLtL2 - 12.2. Predicates on Numbers
CLtL2 - 6.2.2. Specific Data Type Predicates
HyperSpec - Function INTEGERP
On Lisp - Building Functions