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.  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(n), lindex(n), linsert(n), llength(n), lset(n) lsort(n), lrange(n) |

KEYWORDS

       append, element, list, variable

Tcl                                                                 lappend(n)