Testing for a value not sent to a shell script -- MIDRANGE-L

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Subject: Testing for a value not sent to a shell script
From: John McKee <jmmckee@xxxxxxxxxxxxxx>
Date: Wed, 06 May 2009 16:58:50 -0500
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I am drawing a blank here.

How do I test for the absence of of a parameter in a shell script?

If the value is supplied, I can use $1. In DOS BAT files, I have seen where
quotes are used to provide something for the empty variable. I am forgetting
something.

Thanks

John McKee

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Follow-Ups:

Re: Testing for a value not sent to a shell script , Scott Klement

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