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CAD tip CAD tip # 6103:

Question CAD 
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Q - question

Arithmetic expressions in AutoCAD dynamic input fields.

A - answer 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.
100% *  CAD 
22.4.2008    7553×  
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applies to: AutoCAD ·

See also:
Tip 11721:A handy calculator - expression evaluator in 3ds Max.
Tip 11494:Entering decimal values using fractions in CAD applications.
Tip 11289:Adding, multiplying and rounding numbers inside DWG drawing texts - NumInText.
Tip 9630:Inventor trick - conditional parameters (without iLogic)
Tip 9359:Different types of rounding in Inventor parameters.

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