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 9882×

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applies to: AutoCAD ·

See also:
Tip 13583:	Evaluate math expressions in AutoCAD DWG texts.
Tip 13426:	Use of alternative units for arithmetic in dimensions (without square brackets).
Tip 12777:	Arithmetic and trigonometric functions available in Revit expressions.
Tip 12624:	How to enter dimensions in Revit using other units?
Tip 12002:	Arithmetic expressions with measured distances in AutoCAD.

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