/usr/gnu/man/cat.n/append.n.Z(/usr/gnu/man/cat.n/append.n.Z)

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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.  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)