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>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --]
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
[-- Attachment #2 --]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (FreeBSD)
iD8DBQE9+OG3Tv5Mxsi/WPMRAgTpAKCwl5tMuArvd/Nkkjhd/tIv7pDS8ACdGLvF
C8g/Zp89KOyGNeoL31VDkZA=
=7ByU
-----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20021212142121.2e3b5117.pnmurphy>