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From: ogasawar@noscvax.UUCP (Todd H. Ogasawara)
Newsgroups: net.micro,net.micro.pc
Subject: Re: null as variable in batch file
Message-ID: <221@noscvax.UUCP>
Date: Fri, 21-Feb-86 01:33:12 EST
Article-I.D.: noscvax.221
Posted: Fri Feb 21 01:33:12 1986
Date-Received: Mon, 24-Feb-86 06:07:29 EST
References: <22@datagen.UUCP>
Reply-To: ogasawar@cod.UUCP (Todd H. Ogasawara)
Organization: Naval Ocean Systems Center, San Diego
Lines: 17
Xref: linus net.micro:12666 net.micro.pc:6878

In article <22@datagen.UUCP> boykin@datagen.UUCP writes:
><Max S. Robin writes:>
>>foo %1   --how do I detect case where %1 is omitted, thus avoiding
>>	   an error?  I've tried: 

This works pretty good for me:

	IF %0%1==%0 GOTO ...

%0 always equals itself if there is no arg following the invocation of
the batch command name itself.

Todd Ogasawara, Computer Sciences Corp.
NOSC-Hawaii Laboratories

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