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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com> Newsgroups: comp.lang.c Subject: Re: while(T[l]<p & l<=r) Date: Thu, 28 Mar 2024 12:37:39 +0100 Organization: A noiseless patient Spider Lines: 22 Message-ID: <uu3kqb$3i23g$1@dont-email.me> References: <uu109u$3798b$1@i2pn2.org> MIME-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Injection-Date: Thu, 28 Mar 2024 11:37:47 +0100 (CET) Injection-Info: dont-email.me; posting-host="155435c3f40053ae5c3f5cbd325b2209"; logging-data="3737712"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+Ap84ZZuW4eytThbYBR1/Z" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 Cancel-Lock: sha1:80+YSfjs/wDZYREPylq20iMA9zY= In-Reply-To: <uu109u$3798b$1@i2pn2.org> X-Enigmail-Draft-Status: N1110 Bytes: 1901 On 27.03.2024 12:35, fir wrote: > tell me, is while(T[l]<p & l<=r) the same as while((T[l]<p)&&(l<=r)) 1. As long as K&R precedences still hold you don't need the inner parentheses; '<' and '<=' has higher precedence than '&' and '&&'. 2. In this case where you compare predicate expressions that evaluate to '0' and '1' on both sides of '&' and '&&' respectively these expressions are (while not the same) equivalent _here_. If you don't want to operate on bits but want to express a boolean conjunction you should use '&&', though. > i was unable ro remember that You could look that up if you cannot remember that. Wikipedia[*] has a page with a lot information, and a concise list you can, for example, find here: https://www.cs.uic.edu/~i109/Notes/COperatorPrecedenceTable.pdf Janis [*] https://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B