AutoLISP is an actively used programming language created in 1986. AutoLISP is a dialect of the LISP programming language built specifically for use with the full version of AutoCAD and its derivatives, which include AutoCAD Map 3D, AutoCAD Architecture and AutoCAD Mechanical. Neither the application programming interface nor the interpreter to execute AutoLISP code are included in the AutoCAD LT product line. . Read more on Wikipedia...

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Example code from Wikipedia:

1 (defun c:pointlabel ( / pnt )
 2     (if (setq pnt (getpoint "\nSpecify point: "))
 3         (progn
 4             (entmake
 5                 (list
 6                    '(0 . "POINT")
 7                     (cons 10 (trans pnt 1 0))
 8                 )
 9             )
10             (entmake
11                 (list
12                    '(0 . "TEXT")
13                     (cons 10 (trans (cons (+ (car pnt) 0.6) (cdr pnt)) 1 0))
14                     (cons 40 (getvar 'textsize))
15                     (cons  1 (strcat "X:" (rtos (car pnt)) " Y:" (rtos (cadr pnt))))
16                 )
17             )
18         )
19     )
20     (princ)
21 )

Last updated October 14th, 2019