Date: Thu, 12 Dec 2002 09:43:34 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Paul Murphy <pnmurphy@cogeco.ca> Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Shell variables Message-ID: <20021212154334.GC7232@dan.emsphone.com> In-Reply-To: <20021212075922.13985ff8.pnmurphy@cogeco.ca> References: <20021212075922.13985ff8.pnmurphy@cogeco.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
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
--
Dan Nelson
dnelson@allantgroup.com
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20021212154334.GC7232>