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Path: utzoo!linus!decvax!decwrl!glacier!Shasta!tang
From: tang@Shasta.ARPA
Newsgroups: net.micro.pc,net.micro
Subject: Re: null as variable in batch file
Message-ID: <88@Shasta.ARPA>
Date: Tue, 11-Feb-86 23:34:42 EST
Article-I.D.: Shasta.88
Posted: Tue Feb 11 23:34:42 1986
Date-Received: Thu, 13-Feb-86 19:36:20 EST
References: <534@whuts.UUCP>
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Organization: Stanford University
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Xref: linus net.micro.pc:6712 net.micro:12582

> foo %1   --how do I detect case where %1 is omitted, thus avoiding
> 	   an error?  I've tried: 
>                        if %1==''
>                        if %1==' '
>                        if %1==<CTRL @>
>            all to no avail.  Any help or pointers would be appreciated.

Try this, I guess it will work :-)

	if $%1$ == $$

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-mkt