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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: Whaddaya think?
Date: Tue, 18 Jun 2024 00:19:28 -0700
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Kaz Kylheku <643-408-1753@kylheku.com> writes:

> Speaking of while, the do/while construct does not require parentheses
> in order to disambiguate anything, since it has a mandatory semicolon.
> Yet, it still has them.

It has them to allow an extension for a "loop-and-a-half" control
structure:

    do statement while ( expression ) statement

and so for example

    do  c = getchar();  while(  c != EOF  )  n++;

to count characters on standard input.