AutoLISP was first implemented in AutoCAD v2.15, in the form of “Variables and Expressions.” There are many ways to increase your productivity when using AutoCAD and writing your own AutoLISP programs can be an easy one to implement. This feature, built right inside AutoCAD, offers an amazing amount of utility without requiring any programming...

You can use the AutoLISP command function to invoke the AutoCAD or DOS commands under control of an AutoLISP program. Your program may compute parameters on the fly and pass them one at a time to AutoCAD via a series of command function calls, or all the arguments may be prepared and delivered to AutoCAD at once with a single Command function call. There are three...

AutoLISP variables can be created to store numbers, text and coordinates of interest to you. A variable’s value may be retrieved and supplied in response to AutoCAD prompts. Thus variables are rather like the memory keys of a calculator. Expressions involving variables may be used alone or in combination to perform computations. Create variables and assign a value...