: To create a custom command that can be typed into the AutoCAD command line, use the defun function with a C: prefix. For instance, (defun C:HELLO () (prompt "\nHello World!")) defines a new command called HELLO .
: Common types include integers, real numbers (decimals), strings (text), and lists. Lists are the heart of the language and can store anything from a simple set of coordinates to complex drawing data. AutoLISP in AutoCAD
The fundamental rule of AutoLISP is that every statement must be enclosed in parentheses. This structure is known as an S-expression (symbolic expression). : To create a custom command that can
: Functions like getpoint , getreal , and getstring pause the routine to ask the user for specific data. Lists are the heart of the language and
: In AutoLISP, the function name always comes first, followed by its arguments. For example, to add two numbers, you write (+ 1 2) instead of 1 + 2 .
AutoLISP excels at interacting with the AutoCAD environment and its drawing database.