Symbol-Handling Functions Reference (AutoLISP)

The following table provides summary descriptions of the AutoLISP symbol-handling functions.

Symbol-handling functions
Function	Description
(atom item)	Verifies that an item is an atom
(atoms-family format [symlist])	Returns a list of the currently defined symbols
(boundp sym)	Verifies whether a value is bound to a symbol
(not item)	Verifies that an item evaluates to nil
(null item)	Verifies that an item is bound to nil
(numberp item)	Verifies that an item is a real or an integer
(quote expr)	Returns an expression without evaluating it
(set sym expr)	Sets the value of a quoted symbol name to an expression
(setq sym1 expr1 [sym2 expr2 ...])	Sets the value of a symbol or symbols to associated expressions
(type item)	Returns the type of a specified item
(vl-symbol-name symbol)	Returns a string containing the name of a symbol
(vl-symbol-value symbol)	Returns the current value bound to a symbol
(vl-symbolp object)	Identifies whether or not a specified object is a symbol