Re: "enddo" vs "end do" in do control structures
- From: "robin" <robin51@xxxxxxxxxxx>
- Date: Fri, 18 Feb 2011 00:11:29 +1100
Erik Toussaint wrote in message <4d5d1665$0$805$58c7af7e@xxxxxxxxxxxxxxxxx>...
On 17-2-2011 13:20, Jay Vee wrote:
Dear Fortran gurus
I am relatively new to the language and noticed in a lot of literature
the terms "end do" and "enddo" are used (apparently) interchangeably.
What is the signifigance of the two forms, are they different? If so,
is there a historical reason for the distinction and which is the more
correct or appropriate to use?
N1830.pdf (the final draft of the Fortran 2008 standard) mentions the
following in section 22.214.171.124 Blank characters in free form, paragraph 3:
"One or more blanks shall be used to separate adjacent keywords except
in the following cases, where blanks are optional:
END BLOCK DATA
The words are more readable when a blank is present.
And it mentions the following in section 126.96.36.199 on fixed source form,
"Except in a character context, blanks are insigni cant and may be used
freely throughout the program."
Fixed source form is error-prone, thus should be avoided.
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