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From: firth@sei.cmu.edu (Robert Firth)
Newsgroups: comp.lang.fortran
Subject: Re: Modifying iteration variables in DO loops
Message-ID: <4026@aw.sei.cmu.edu>
Date: 2 Feb 88 15:20:12 GMT
References: <1309@nmtsun.nmt.edu>
Sender: netnews@sei.cmu.edu
Reply-To: firth@bd.sei.cmu.edu.UUCP (Robert Firth)
Organization: Carnegie-Mellon University, SEI, Pgh, Pa
Lines: 12
Keywords: X3 standard FORTRAN 77

In article <1309@nmtsun.nmt.edu> john@nmtsun.nmt.edu (John Shipman) writes:
>In section 11.10 of X3.9-1978, the FORTRAN 77 standard (pp. 11-5 to
>11-9), there is no statement about prohibiting the modification of a
>DO variable within a loop.

ANSI X3.9-1978 11.10.5:

	"Except by the incrementation described in 11.10.7,
	 the DO-variable of the DO-loop may neither be
	 redefined nor become undefined during execution
	 of the range of the DO-loop"

Happy Groundhog Day!