break(1) [opendarwin man page]

break(n)						       Tcl Built-In Commands							  break(n)

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NAME

       break - Abort looping command

SYNOPSIS

       break
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DESCRIPTION

       This command is typically invoked inside the body of a looping command such as for or foreach or while.	It returns a TCL_BREAK code, which
       causes a break exception to occur.  The exception causes the current script to be aborted out to the  innermost	containing  loop  command,
       which  then aborts its execution and returns normally.  Break exceptions are also handled in a few other situations, such as the catch com-
       mand, Tk event bindings, and the outermost scripts of procedure bodies.

SEE ALSO

       catch(n), continue(n), for(n), foreach(n), while(n)

KEYWORDS

       abort, break, loop

Tcl																	  break(n)

for(n)							       Tcl Built-In Commands							    for(n)

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NAME

       for - ``For'' loop

SYNOPSIS

       for start test next body
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DESCRIPTION

       For  is	a  looping command, similar in structure to the C for statement.  The start, next, and body arguments must be Tcl command strings,
       and test is an expression string.  The for command first invokes the Tcl interpreter to execute start.  Then it repeatedly  evaluates  test
       as  an expression; if the result is non-zero it invokes the Tcl interpreter on body, then invokes the Tcl interpreter on next, then repeats
       the loop.  The command terminates when test evaluates to 0.  If a continue command is invoked within body then any  remaining  commands	in
       the  current  execution of body are skipped; processing continues by invoking the Tcl interpreter on next, then evaluating test, and so on.
       If a break command is invoked within body or next, then the for command will return immediately.  The operation of break and  continue  are
       similar to the corresponding statements in C.  For returns an empty string.

       Note:  test  should almost always be enclosed in braces.  If not, variable substitutions will be made before the for command starts execut-
       ing, which means that variable changes made by the loop body will not be considered in the expression.  This is	likely	to  result  in	an
       infinite loop.  If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
       ation), so changes in the variables will be visible.  For an example, try the following script with and without the braces around $x<10:
	      for {set x 0} {$x<10} {incr x} {
		puts "x is $x"
	      }

SEE ALSO

       break, continue, foreach, while

KEYWORDS

       for, iteration, looping

Tcl																	    for(n)