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From: Ron Shepard <ron-shep...@NOSPAM.comcast.net>
Newsgroups: comp.lang.fortran
Subject: Re: fortran
Organization: little, if any
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In article <jnk0ac$33...@speranza.aioe.org>, dpb <n...@non.net> 
wrote:

> But, afaik there is no F77 compiler that doesn't 
> include accepting lowercase in source code so I've not modified your 
> typing in that regards.

This is largely true, but there were f77 compilers that, by default, 
would take lower case characters and treat them as distinct from 
upper case (i.e. following the C language conventions).

Although there have been numerous discussions about this here in 
c.l.f over the past 20 years, the above is generally regarded as an 
extension of the f77 language.  On the other hand, treating lower 
and upper case as indistinguishable was *not* an extension to the 
language, but rather falls into the category of source code 
transcription, which is explicitly mentioned as something that is 
not covered by the standard.  F90 and later specified that lower and 
upper case characters should be indistinguishable (except for 
character strings, of course); this is compatible with the f77 
standard, but obviously not with those with the extension that 
treated lower and upper case as distinct.

$.02 -Ron Shepard