lispdoc - results for numberp

(numberp object)
Function: Return true if OBJECT is a NUMBER, and NIL otherwise.
Example:
(defun not-numberp (x) (not (numberp x)))
Mentioned in:
CLtL2 - 12.2. Predicates on Numbers
CLtL2 - 26.10. Conditional Execution
CLtL2 - 4.3. Predicating Type Specifiers
CLtL2 - 6. Predicates
CLtL2 - 6.2.2. Specific Data Type Predicates
HyperSpec - Function NUMBERP
Successful Lisp - evaluated