From owner-freebsd-questions  Thu Dec 12 11:21:52 2002
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 9818B37B401
	for <freebsd-questions@FreeBSD.ORG>; Thu, 12 Dec 2002 11:21:50 -0800 (PST)
Received: from fep1.cogeco.net (smtp.cogeco.net [216.221.81.25])
	by mx1.FreeBSD.org (Postfix) with ESMTP id EFF0443EC5
	for <freebsd-questions@FreeBSD.ORG>; Thu, 12 Dec 2002 11:21:49 -0800 (PST)
	(envelope-from pnmurphy@cogeco.ca)
Received: from earth.upton.net (d141-18-230.home.cgocable.net [24.141.18.230])
	by fep1.cogeco.net (Postfix) with SMTP
	id 3143C9AB3; Thu, 12 Dec 2002 14:21:41 -0500 (EST)
Date: Thu, 12 Dec 2002 14:21:21 -0500
From: Paul Murphy <pnmurphy@cogeco.ca>
To: Dan Nelson <dnelson@allantgroup.com>
Cc: freebsd-questions@FreeBSD.ORG,
	Roman Neuhauser <neuhauser@bellavista.cz>,
	Scott Robbins <scottro@despammed.com>
Subject: Re: Shell variables
Message-Id: <20021212142121.2e3b5117.pnmurphy@cogeco.ca>
In-Reply-To: <20021212154334.GC7232@dan.emsphone.com>
References: <20021212075922.13985ff8.pnmurphy@cogeco.ca>
	<20021212154334.GC7232@dan.emsphone.com>
X-Mailer: Sylpheed version 0.8.6claws (GTK+ 1.2.10; i386-portbld-freebsd4.7)
Mime-Version: 1.0
Content-Type: multipart/signed; protocol="application/pgp-signature";
 micalg="pgp-sha1"; boundary="=.aKGKKth?5rdI.m"
Sender: owner-freebsd-questions@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-questions.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-questions>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-questions>
X-Loop: FreeBSD.ORG

--=.aKGKKth?5rdI.m
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

On Thu, 12 Dec 2002 09:43:34 -0600
Dan Nelson <dnelson@allantgroup.com> wrote:

> In the last episode (Dec 12), Paul Murphy said:
> >  I am having trouble understanding what is the difference between
> >  "$variable" and "${variable}".
> > 
> >  I have read sh(1) and understand than ${} is a "parameter" and can
> >  contain more than just a variable, but browsing through /etc/rc I
> >  see lots of "${variable}" (i.e. "case ${svc_val} in").
> > 
> >  Is this just for readability or is there some functional difference?
> 
> Mainly readability, but sometimes you need the {}'s to delimit the
> variable name: compare
> 
> echo texttext${variablehere}texttext
> 
> vs.
> 
> echo texttext$variableheretexttext
> 

 Thanks all, I've got it now.

-- 
Cogeco ergo sum

--=.aKGKKth?5rdI.m
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (FreeBSD)

iD8DBQE9+OG3Tv5Mxsi/WPMRAgTpAKCwl5tMuArvd/Nkkjhd/tIv7pDS8ACdGLvF
C8g/Zp89KOyGNeoL31VDkZA=
=7ByU
-----END PGP SIGNATURE-----

--=.aKGKKth?5rdI.m--

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message