1lappend(n) Tcl Built-In Commands lappend(n)
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8 lappend - Append list elements onto a variable
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11 lappend varName ?value value value ...?
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16 This command treats the variable given by varName as a list and appends
17 each of the value arguments to that list as a separate element, with
18 spaces between elements. If varName doesn't exist, it is created as a
19 list with elements given by the value arguments. Lappend is similar to
20 append except that the values are appended as list elements rather than
21 raw text. This command provides a relatively efficient way to build up
22 large lists. For example, ``lappend a $b'' is much more efficient than
23 ``set a [concat $a [list $b]]'' when $a is long.
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26 Using lappend to build up a list of numbers.
27 % set var 1
28 1
29 % lappend var 2
30 1 2
31 % lappend var 3 4 5
32 1 2 3 4 5
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36 list(n), lindex(n), linsert(n), llength(n), lset(n) lsort(n), lrange(n) │
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40 append, element, list, variable
41Tcl lappend(n)