freebsd-dev/contrib/tcl/doc/break.n

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'\"
'\" 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.
'\"
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'\" SCCS: @(#) break.n 1.7 96/10/09 08:29:26
'\"
.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
\fBbreak\fR
.BE
.SH DESCRIPTION
.PP
This command is typically invoked inside the body of a looping command
such as \fBfor\fR or \fBforeach\fR or \fBwhile\fR.
It returns a TCL_BREAK code, which causes a break exception
to occur.
The exception causes the current script to be aborted
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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 \fBcatch\fR command, Tk event bindings, and the outermost
scripts of procedure bodies.
.SH KEYWORDS
abort, break, loop