Function-Handling Functions Reference (AutoLISP)

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

Function-handling functions		Platforms
		Windows		Mac OS		Web
Function	Description	AutoCAD	AutoCAD LT	AutoCAD	AutoCAD LT	AutoCAD
(apply function lst)	Passes a list of arguments to a specified function	✓	✓	✓	--	✓
(defun sym ([arguments] [/variables ...]) expr ... )	Defines a function	✓	✓	✓	--	✓
(defun-q sym ([arguments] [/ variables ...]) expr ...)	Defines a function as a list (intended for backward-compatibility only)	✓	✓	✓	--	✓
(defun-q-list-ref 'function)	Displays the list structure of a function defined with defun-q	✓	✓	✓	--	✓
(defun-q-list-set 'sym list)	Defines a function as a list (intended for backward-compatibility only)	✓	✓	✓	--	✓
(eval expr)	Returns the result of evaluating an AutoLISP expression	✓	✓	✓	--	✓
(lambda arguments expr ...)	Defines an anonymous function	✓	✓	✓	--	✓
(progn [expr ...])	Evaluates each expression sequentially, and returns the value of the last expression	✓	✓	✓	--	✓
(trace function ...)	Aids in AutoLISP debugging	✓	✓	✓	--	✓
(untrace function ...)	Clears the trace flag for the specified functions	✓	✓	✓	--	✓