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From: mshapiro@nosc.mil (Michael D Shapiro)
Subject: Spaces in Fortran (was Re: Why don't large companies use Ada?)
Message-ID: <1994Dec13.214739.16178@nosc.mil>
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References: <3aa7jo$7j@Starbase.NeoSoft.COM> <3bd06n$kbt@felix.seas.gwu.edu>
 <3c1oj4$h3s@gnat.cs.nyu.edu> <1994Dec6.131404@hobbit>
Date: Tue, 13 Dec 1994 21:47:39 GMT
Date: 1994-12-13T21:47:39+00:00
List-Id: <comp.lang.ada>

In article <1994Dec6.131404@hobbit>,
Mark S. Hathaway <hathawa2@marshall.edu> wrote:
>> In article <3c1oj4$h3s@gnat.cs.nyu.edu>,
>> dewar@cs.nyu.edu (Robert Dewar) writes:
>
>>   { statements describing the infamous Fortran assignment statement: }
>> 
>>    DO 10 I = 1.5
>
>In the world of music it is said that the silence between the notes is an
>integral part of the music.  Apparently the language parser should recognize
>the blanks between "key words" as relevant.

The current Fortran standard allows two forms for statements, "free"
and "fixed."  In free source form, a blank must be used to separate
names, constants, or labels from adjacent keywords, names constants, or
labels.  Also, the blank characters must not appear within lexical
tokens.  In fixed source form, blanks are insignificant except in a
character context.  I believe we would currently refer to this form as
a "legacy" form (something handed down from an ancestor or predecessor)
except that some of us that built and used FORTRAN compilers are still
around.
--
Michael D. Shapiro, Ph.D.         Internet: mshapiro@nosc.mil
Code 4123, NCCOSC RDT&E Division (NRaD)    San Diego CA 92152
Voice: (619) 553-4080    FAX: (619) 553-4808    DSN: 553-4080