RedHat 9 (Linux i386) - man page for append (redhat section n)

append(n)			      Tcl Built-In Commands				append(n)

_________________________________________________________________________________________________

NAME
       append - Append to variable

SYNOPSIS
       append varName ?value value value ...?
_________________________________________________________________

DESCRIPTION
       Append  all  of	the value arguments to the current value of variable varName.  If varName
       doesn't exist, it is given a value equal to the concatenation of all the value  arguments.
       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.

SEE ALSO
       concat(n), lappend(n)

KEYWORDS
       append, variable

Tcl											append(n)