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Article #5456Re: null as variable in batch file
From: Kim DeVaughn
Date: Wed, 12 Feb 1986 11:56
Date: Wed, 12 Feb 1986 11:56
25 lines
1269 bytes
1269 bytes
[ ... go ahead, eat my bits ... ]
> Does anyone know how to detect a null as variable input in a batch file?
> Specifically:
>
> foo %1 --how do I detect case where %1 is omitted, thus avoiding
> an error? I've tried 'if %1=='':goto xx' as well as
> ==' '
Hmmm ... I should probably try this out first, but my MS-DOS machine is
unavailable right now. I *think* this will do what you want:
if .%1 == . goto xx
Note the "dots". Also, I pretty sure that this will work too:
if "%1" == "" goto xx
/kim
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site mips.UUCP Path: arc1-ca.pugleaf.net!utzoo!linus!decvax!decwrl!glacier!mips!kim From: kim@mips.UUCP (Kim DeVaughn) Newsgroups: net.micro.pc,net.micro Subject: Re: null as variable in batch file Message-ID: <330@mips.UUCP> Date: Wed, 12-Feb-86 06:56:52 EST Article-I.D.: mips.330 Posted: Wed Feb 12 06:56:52 1986 Date-Received: Fri, 14-Feb-86 06:01:41 EST References: <533@whuts.UUCP> Distribution: net Organization: mips ... where RISC is a way of life Lines: 25