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From: mkhaw@teknowledge-vaxc.ARPA (Mike Khaw)
Newsgroups: comp.unix.questions
Subject: Re: Environment variables
Message-ID: <16068@teknowledge-vaxc.ARPA>
Date: Wed, 26-Aug-87 04:35:40 EDT
Article-I.D.: teknowle.16068
Posted: Wed Aug 26 04:35:40 1987
Date-Received: Fri, 28-Aug-87 00:46:38 EDT
References: <4942@columbia.edu>
Organization: Teknowledge, Inc., Palo Alto CA
Lines: 18

->>> How can I determine if an environment variable is set using csh?
...
-> maybe this is a stupid answer, but have you tried $?VARIABLE ?
-> 
-> % echo $?TERM
-> 1
-> % echo $?FOO
-> 0

This isn't quite right if you are unfortunate enough to have done:

	% set TERM = whatever	# a csh var., not an env. var.

Mike Khaw
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