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Test if parameter is set

X-seq: zsh-users 15963
From: Thorsten Kampe <thorsten@xxxxxxxxxxxxxxxx>
To: zsh-users@xxxxxxx
Subject: Test if parameter is set
Date: Tue, 19 Apr 2011 18:48:57 +0200
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Hi,

how can I test if a parameter is set?

Like in...

if $VAR_IS_SET; then
    print Variable is set
else
    print Variable is not set
fi

Thorsten

Follow-Ups:
- Re: Test if parameter is set
  - From: Peter Stephenson
- Re: Test if parameter is set
  - From: Stephane Chazelas
- Re: Test if parameter is set
  - From: Frank Terbeck

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