Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: bart <bc@freeuk.com>
Newsgroups: comp.lang.c
Subject: Re: Loops (was Re: do { quit; } else { })
Date: Wed, 16 Apr 2025 12:01:31 +0100
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On 16/04/2025 06:19, Janis Papanagnou wrote:
> On 15.04.2025 12:30, bart wrote:

> (One of your fundamental problems with "C" seems to be to understand
> the 'for' keyword meaning only counted loops with one variable and a
> simple +1 increment. - I can't help you here.)

And your problem seems to the opposite: being unable to understand that 
for-loop (perhaps spelled 'do') can be a specialised feature to iterate 
one or more variables over a predetermined range or set of values.

Unlike C's for, which is just a gimmick where you bundle three 
potentially unrelated expressions and hope for the best.

Everyone here is defending the latter to the death. Why? Apparently the 
ONLY argument is 'flexibility'.

Having to writing a simple iteration in such a convoluted and unchecked 
manner is much better because - you can use the same syntax to iterate 
over a list!


> I've written code where the logic required comparisons of  i < N-1
> and also  i <= N . So what? - Should I not do that because you are
> getting confused when inspecting my code?


This is worrying. So you have a bunch of code with multiple like this:

   for (i=0; i<N; ++)
   for (i=0; i<N; ++)
   for (i=0; i<=N; ++)
   for (i=0; i<N; ++)

And you notice one has <= while the others have <. But according to you, 
this is nothing remarkable and raises no flags. Obviously the author 
intended to iterate one more time there!

With language-supported iteration, the comparison operator is not 
exposed, so the programmer cannot accidentally type the wrong one.

(I see I have ++ and not ++i; never mind. It is telling that it took me 
a minute to notice!)