CAD tip # 6103:

Question

CAD

% platform category

Arithmetic expressions in AutoCAD dynamic input fields.

Using AutoLISP, you can enter values computed as mathematical expressions - at almost any prompt in AutoCAD, including the fields of dynamic input interface.

E.g. when specifying a line length (direction given by cursor rubberline) you can enter not only a number (distance) but also a LISP function (equation) enclosed in round brackets - e.g.:

(- 264 39)
(* 6 7)
(/ 22.0 7.0)
(+ 1 2 3 4 5)

Please note that the LISP notation is different from common arithmetics - first comes the function, then its operands.

ACAD

*CAD

22.4.2008 10354×

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applies to: AutoCAD ·

See also:
Tip 14459:	How to replace missing functions min() and max() in Revit expressions?
Tip 14417:	Quick calculator on an AutoCAD keyboard shortcut.
Tip 14363:	Yesterday's, tomorrow's, past or future date in the DWG drawing.
Tip 14223:	Arithmetic operations for renaming blocks, levels, layouts...
Tip 13583:	Evaluate math expressions in AutoCAD DWG texts.

Selected tip: How to change the +/- (plus-minus) symbol in dimension tolerances in AutoCAD Mechanical or MDT?

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