[J3] [EXTERNAL] [BULK] Re: A couple more ideas for features

Clune, Thomas L. (GSFC-6101) thomas.l.clune at nasa.gov
Thu Apr 6 15:10:56 UTC 2023

Hi David,
EXIT and CYCLE definitely make DO WHILE unnecessary; no argument there.   But I have many cases where I consider DO WHILE(cond) to make the loop more intelligible to humans.  My guess is that there are far fewer cases where DO … UNTIL provides such additional clarity.


  *   Tom

From: J3 <j3-bounces at mailman.j3-fortran.org> on behalf of j3 <j3 at mailman.j3-fortran.org>
Reply-To: David Muxworthy <d.muxworthy at bcs.org.uk>, j3 <j3 at mailman.j3-fortran.org>
Date: Thursday, April 6, 2023 at 11:06 AM
To: j3 <j3 at mailman.j3-fortran.org>
Cc: "d.muxworthy at icloud.com" <d.muxworthy at icloud.com>
Subject: [EXTERNAL] [BULK] Re: [J3] A couple more ideas for features

CAUTION: This email originated from outside of NASA.  Please take care when clicking links or opening attachments.  Use the "Report Message" button to report suspicious messages to the NASA SOC.

The DO block was introduced in F90.  As I remember the discussions, it was thought that DO ... END DO with EXIT and CYCLE made WHILE and UNTIL unnecessary.  However WHILE got added because other languages had it.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.j3-fortran.org/pipermail/j3/attachments/20230406/5f74286d/attachment.htm>

More information about the J3 mailing list