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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 does not exist, it is
       given a value equal to the concatenation 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 incremen-
       tally.  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)