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 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(3tcl), lappend(3tcl)

KEYWORDS

       append, variable