append
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 doesn't exist, it is given a value equal to the  con-
       catenation  of all the value arguments.  This command provides an effi-
       cient 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)