lappend(3tcl)

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 does not exist, it is created as a
   list with elements given by the value arguments.  Lappend 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.

EXAMPLE

   Using lappend to build up a list of numbers.
          % set var 1
          1
          % lappend var 2
          1 2
          % lappend var 3 4 5
          1 2 3 4 5

SEE ALSO

   list(3tcl),  lindex(3tcl),  linsert(3tcl),  llength(3tcl),  lset(3tcl),
   lsort(3tcl), lrange(3tcl)

KEYWORDS

   append, element, list, variable

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