Hi Am 14.02.22 um 13:47 schrieb Ville Syrjälä:
On Mon, Feb 14, 2022 at 01:12:48PM +0100, Thomas Zimmermann wrote:Hi Am 14.02.22 um 11:38 schrieb Andy Shevchenko:On Mon, Feb 14, 2022 at 10:03:53AM +0100, Thomas Zimmermann wrote:Am 11.02.22 um 16:41 schrieb Andy Shevchenko:...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.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'.
Well, indeed. lolFun fact: I actually had to look this up and still got it wrong. Let me just count it under proving-my-point: continue in a for statement is a bad idea and for isn't equivalent to while.
Best regards Thomas
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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