Editing AutoLISP (section)

==Features==
AutoLISP is a small, dynamically [[Scope (computer science)|scoped]], dynamically typed Lisp language dialect with [[Garbage collection (computer science)|garbage collection]], immutable list structure, and settable symbols, lacking in such regular Lisp features as [[Macro (computer science)|macro]] system, records definition facilities, arrays, functions with variable number of arguments and let bindings. Aside from the core language, most of the primitive functions are for geometry, accessing AutoCAD's internal [[.dwg|DWG]] database, or manipulation of graphical entities in AutoCAD. The properties of these graphical entities are revealed to AutoLISP as [[association list]]s in which values are paired with AutoCAD ''group codes'' that indicate properties such as definitional points, radii, colors, layers, linetypes, etc. AutoCAD loads AutoLISP code from .LSP files.<ref name=documentation>{{cite web |url=http://docs.autodesk.com/ACDMAC/2013/ENU/PDFs/acdmac_2013_autolisp_developers_guide.pdf |title=AutoLISP Developer's Guide |access-date=14 April 2014}}</ref>

AutoLISP code can interact with the user through AutoCAD's graphical editor by use of primitive functions that allow the user to pick points, choose objects on screen, and input numbers and other data. AutoLisp also has a built-in [[graphical user interface]] (GUI) mini- or [[domain-specific language]] (DSL), the [[Dialog Control Language]], for creating modal dialog boxes with automated layout, within AutoCAD.<ref name=documentation />