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'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\" Copyright (c) 2001 Kevin B. Kenny <kennykb@acm.org>. All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH lappend n "" Tcl "Tcl Built-In Commands"
.so man.macros
.BS
'\" Note: do not modify the .SH NAME line immediately below!
.SH NAME
lappend \- Append list elements onto a variable
.SH SYNOPSIS
\fBlappend \fIvarName \fR?\fIvalue value value ...\fR?
.BE
.SH DESCRIPTION
.PP
This command treats the variable given by \fIvarName\fR as a list
and appends each of the \fIvalue\fR arguments to that list as a separate
element, with spaces between elements.
If \fIvarName\fR does not exist, it is created as a list with elements
given by the \fIvalue\fR arguments.
\fBLappend\fR is similar to \fBappend\fR except that the \fIvalue\fRs
are appended as list elements rather than raw text.
This command provides a relatively efficient way to build up
large lists. For example,
.QW "\fBlappend a $b\fR"
is much more efficient than
.QW "\fBset a [concat $a [list $b]]\fR"
when \fB$a\fR is long.
.SH EXAMPLE
.PP
Using \fBlappend\fR to build up a list of numbers.
.PP
.CS
% set var 1
1
% \fBlappend\fR var 2
1 2
% \fBlappend\fR var 3 4 5
1 2 3 4 5
.CE
.SH "SEE ALSO"
list(n), lindex(n), linsert(n), llength(n), lset(n),
lsort(n), lrange(n)
.SH KEYWORDS
append, element, list, variable
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