append man page on MacOSX

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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 var‐
       Name.  If varName does not 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)
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