Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!decvax!ima!haddock!karl
From: karl@haddock.ima.isc.com (Karl Heuer)
Newsgroups: comp.lang.c
Subject: Re: value of TRUE???
Keywords: TRUE, if(), another nonzero value
Message-ID: <11978@haddock.ima.isc.com>
Date: 7 Mar 89 22:14:44 GMT
References: <987@infmx.UUCP> <16248@mimsy.UUCP>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Distribution: usa
Organization: Interactive Systems, Boston
Lines: 12

In article <16248@mimsy.UUCP> chris@mimsy.UUCP (Chris Torek) writes:
>[The operators] !, <, <=, >, >=, ==, !=, &&, and || ... return either <int,1>
>(representing `true') or <int,0> (representing `false').  Thus, in [this]
>respect, the value of `true' is <int,1>.  No other value is produced for true
>conditional expressions.

This is true for the operators, as you say.  It should probably be mentioned
that it is not necessarily true for functions, even those standard library
functions that are conceptually boolean: for example, isdigit('6') returns 4
on this system.

Karl W. Z. Heuer (ima!haddock!karl or karl@haddock.isc.com), The Walking Lint