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unset.n
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1993-06-16
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'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" All rights reserved.
'\"
'\" Permission is hereby granted, without written agreement and without
'\" license or royalty fees, to use, copy, modify, and distribute this
'\" documentation for any purpose, provided that the above copyright
'\" notice and the following two paragraphs appear in all copies.
'\"
'\" IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
'\" FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
'\" ARISING OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
'\" CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'\"
'\" THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
'\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
'\" AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
'\" ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
'\" PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
'\"
'\" $Header: /user6/ouster/tcl/man/RCS/unset.n,v 1.1 93/06/16 16:48:28 ouster Exp $ SPRITE (Berkeley)
'\"
.so man.macros
.HS unset tcl
.BS
'\" Note: do not modify the .SH NAME line immediately below!
.SH NAME
unset \- Delete variables
.SH SYNOPSIS
\fBunset \fIname \fR?\fIname name ...\fR?
.BE
.SH DESCRIPTION
.PP
This command removes one or more variables.
Each \fIname\fR is a variable name, specified in any of the
ways acceptable to the \fBset\fR command.
If a \fIname\fR refers to an element of an array then that
element is removed without affecting the rest of the array.
If a \fIname\fR consists of an array name with no parenthesized
index, then the entire array is deleted.
The \fBunset\fR command returns an empty string as result.
An error occurs if any of the variables doesn't exist, and any variables
after the non-existent one are not deleted.
.SH KEYWORDS
remove, variable