lappend(1T) Tcl Built-In Commands lappend(1T)
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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(1T), lindex(1T), linsert(1T), llength(1T), lset(1T) lsort(1T), lrange(1T) |
KEYWORDS
append, element, list, variable
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Availability | SUNWTcl |
+--------------------+-----------------+
|Interface Stability | Uncommitted |
+--------------------+-----------------+
NOTES
Source for Tcl is available on http://opensolaris.org.
Tcl lappend(1T)
