Cons-Or-Null [Concept]
Purpose
The Cons-or-Null predicate tests whether a given object is a Lisp cons or nil.
Syntax
Cons-Or-Null object
Argument
The object argument is any object.
Value
The Cons-Or-Null predicate returns t if object is a cons or nil.
Examples
(ask (Cons-Or-Null '(1 2 3))) ==> T
(ask (Cons-Or-Null nil)) ==> T
See Also
Last modified: Jun 1 1995