Verifies that an item is bound to nil
Supported Platforms: Windows, Mac OS, and Web
Signature
(null item)
- item
-
Type: Integer, Real, String, List, Ename (entity name), T, or nil
An AutoLISP expression.
Return Values
Type: T or nil
T if item evaluates to nil; otherwise nil.
Examples
(setq a 123 b "string" c nil) nil (null a) nil (null b) nil (null c) T (null '()) T