OpenDarwin 7.2.1 - man page for lappend (opendarwin section n)

lappend(n)			      Tcl Built-In Commands			       lappend(n)

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NAME
       lappend - Append list elements onto a variable

SYNOPSIS
       lappend varName ?value value value ...?
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DESCRIPTION
       This  command treats the variable given by varName as a list and appends each of the value
       arguments to that list as a separate element, with spaces between  elements.   If  varName
       doesn't	exist,	it is created as a list with elements given by the value arguments.  Lap-
       pend is similar to append except that the values are appended as list elements rather than
       raw  text.  This command provides a relatively efficient way to build up large lists.  For
       example, ``lappend a $b'' is much more efficient than ``set a [concat $a [list $b]]'' when
       $a is long.

SEE ALSO
       list(n), lindex(n), linsert(n), llength(n), lset(n) lsort(n), lrange(n)			  |

KEYWORDS
       append, element, list, variable

Tcl										       lappend(n)