Re: Local vs global variables in ADA

["R. Tim Coslet" <R_Tim_Coslet@pacbell.net>]

Just a bit of trivia, but the counter in an Ada "for" loop is NOT a
variable. It is defined as a *constant* initialized to successive different
values on each iteration of the loop.

If it were a variable the program could change the value with the assignment
statement or by passing it as an out or in out parameter to a procedure.
This is forbidden and will be reported as an error by any validated Ada
compiler.

-- 
        R. Tim Coslet
        r_tim_coslet@pacbell.net

Technology, n. Domesticated natural phenomena.


> From: claveman@grzorgenplatz.net (Charles H. Sampson)
> Organization: NetHere Inc.
> Newsgroups: comp.lang.ada
> Date: Tue, 5 Nov 2002 05:53:55 -0800
> Subject: Re: Local vs global variables in ADA
> 
[...]
> 
> Seriously, here's what I try to do: use the for-loop and while-loop
> only when they express the loop's termination condition.  In other
> words, do not use exit statements within loops of these forms; if a loop
> requires an exit statement, then use an "infinite" loop instead.
> Unfortunately, my will power is often too weak to overcome the
> convenience of the automatically declared counting variable of a
> for-loop.  I'm much better with while loops.
> 
> Charlie