CAD tip # 7812:

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How to write line-feed to a text file in AutoLISP.

The AutoLISP functions (write-line) and (write-char) automatically add the full CR/LF sequence (carriage return, line feed) when trying to output just the LF (line-feed, chr 10).

There is a trick of forcing AutoCAD to output really just the line-feed. Use the (write-char) function and add 256 to the character code. So instead of (write-char 10 f), use (write-char 266 f). An example:


(setq f (open "C:/TEMP/TESTFILE.TXT" "w"))
(write-char 266 f)
(close f)

writes a file testfile.txt containing just the LF character.

ACAD2011

*CAD

23.2.2011 19293×

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this tip shared by ARKANCE experts applies to: AutoCAD 2011 ·

See also:
Tip 14991:	Changing the order of rows in a table - sorting tables in AutoCAD.
Tip 14911:	Using symbolic variables to enter repeated values in AutoCAD.
Tip 14889:	Unfolding of general polygonal 3D meshes (mesh unfolder).
Tip 14618:	Easy copying of DWG entities with rotation.
Tip 14604:	QRcode - dynamically generated QR codes in AutoCAD.

Selected tip: How to replace some of your blocks with a new block?

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