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'\"
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'\" Copyright (c) 1993 The Regents of the University of California.
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'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
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'\"
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'\" See the file "license.terms" for information on usage and redistribution
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'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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'\"
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'\" RCS: @(#) $Id: incr.n,v 1.1.1.1 2002-01-16 10:25:24 markom Exp $
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'\"
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.so man.macros
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.TH incr n "" Tcl "Tcl Built-In Commands"
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.BS
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'\" Note: do not modify the .SH NAME line immediately below!
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.SH NAME
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incr \- Increment the value of a variable
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.SH SYNOPSIS
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\fBincr \fIvarName \fR?\fIincrement\fR?
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.BE
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.SH DESCRIPTION
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.PP
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Increments the value stored in the variable whose name is \fIvarName\fR.
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The value of the variable must be an integer.
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If \fIincrement\fR is supplied then its value (which must be an
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integer) is added to the value of variable \fIvarName\fR; otherwise
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1 is added to \fIvarName\fR.
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The new value is stored as a decimal string in variable \fIvarName\fR
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and also returned as result.
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.SH KEYWORDS
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add, increment, variable, value
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