x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
append(n) Tcl Built-In Commands append(n)
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NAME
append - Append to variable
SYNOPSIS
append varName ?value value value ...?
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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
SEE ALSO
concat(n), lappend(n)
KEYWORDS
append, variable
Tcl append(n)
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