On Mon, Feb 14, 2022 at 01:12:48PM +0100, Thomas Zimmermann wrote:

Hi

Am 14.02.22 um 11:38 schrieb Andy Shevchenko:

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On Mon, Feb 14, 2022 at 10:03:53AM +0100, Thomas Zimmermann wrote:

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Am 11.02.22 um 16:41 schrieb Andy Shevchenko:

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IMO *always* prefer a for loop over while or do-while.

The for (i = 0; i < N; i++) is such a strong paradigm in C. You
instantly know how many times you're going to loop, at a glance. Not so
with with the alternatives, which should be used sparingly.

while () {}  _is_ a paradigm, for-loop is syntax sugar on top of it.

Naw, that's not true.

In the section 3.5 "Loops - While and For" in "The C Programming
Language" 2nd by K&R, the authors said:

Year of publication: 1988 . It's not the most up-to-date reference for C 
programming.

quoted

	The for statement ... is equivalent to ... while..."

They said that for is equivalent to while, and not otherwise.

Even leaving readability aside, it's not equivalent. You can declare 
variables as part of the for statement. (I know it's not the kernel's 
style.) Also, 'continue' statements are not well-suited in for loops, 
because it's non-obvious if the loop's update statement is being 
executed. (It isn't.)

It is.

'continue' is just shorthand for 'goto end_of_loop_body'.

-- 
Ville Syrjälä
Intel