append - Append to variable
append varName ?value value value ...?
append(1t) Tcl Built-In Commands append(1t)
______________________________________________________________________________
NAME
append - Append to variable
SYNOPSIS
append varName ?value value value ...?
______________________________________________________________________________
DESCRIPTION
Append all of the value arguments to the current value of variable var-
Name. If varName does not exist, it is given a value equal to the con-
catenation of all the value arguments. The result of this command is
the new value stored in variable varName. This command provides an
efficient way to build up long variables incrementally. For example,
"append a $b" is much more efficient than "set a $a$b" if $a is long.
EXAMPLE
Building a string of comma-separated numbers piecemeal using a loop.
set var 0
for {set i 1} {$i<=10} {incr i} {
append var "," $i
}
puts $var
# Prints 0,1,2,3,4,5,6,7,8,9,10
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | runtime/tcl-8 |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
concat(n), lappend(n)
KEYWORDS
append, variable
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from http://prdownloads.sourceforge.net/tcl/tcl-
core8.6.7-src.tar.gz.
Further information about this software can be found on the open source
community website at https://www.tcl.tk/.
Tcl append(1t)