break.n
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:1k
- '"
- '" Copyright (c) 1993-1994 The Regents of the University of California.
- '" Copyright (c) 1994-1996 Sun Microsystems, Inc.
- '"
- '" See the file "license.terms" for information on usage and redistribution
- '" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- '"
- '" RCS: @(#) $Id: break.n,v 1.3.18.1 2004/10/27 09:35:38 dkf Exp $
- '"
- .so man.macros
- .TH break n "" Tcl "Tcl Built-In Commands"
- .BS
- '" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- break - Abort looping command
- .SH SYNOPSIS
- fBbreakfR
- .BE
- .SH DESCRIPTION
- .PP
- This command is typically invoked inside the body of a looping command
- such as fBforfR or fBforeachfR or fBwhilefR.
- It returns a fBTCL_BREAKfR 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 fBcatchfR command, Tk event bindings, and the outermost
- scripts of procedure bodies.
- .SH EXAMPLE
- Print a line for each of the integers from 0 to 5:
- .CS
- for {set x 0} {$x<10} {incr x} {
- if {$x > 5} {
- fBbreakfR
- }
- puts "x is $x"
- }
- .CE
- .SH "SEE ALSO"
- catch(n), continue(n), for(n), foreach(n), return(n), while(n)
- .SH KEYWORDS
- abort, break, loop