break(1p) [centos man page]

BREAK(1P)						     POSIX Programmer's Manual							 BREAK(1P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       break - exit from for, while, or until loop

SYNOPSIS

       break [n]

DESCRIPTION

       The break utility shall exit from the smallest enclosing for, while, or until loop, if any; or from the nth enclosing loop if n	is  speci-
       fied.  The  value  of  n is an unsigned decimal integer greater than or equal to 1. The default shall be equivalent to n=1. If n is greater
       than the number of enclosing loops, the outermost enclosing loop shall be exited. Execution shall continue  with  the  command  immediately
       following the loop.

OPTIONS

       None.

OPERANDS

       See the DESCRIPTION.

STDIN

       Not used.

INPUT FILES

       None.

ENVIRONMENT VARIABLES

       None.

ASYNCHRONOUS EVENTS

       Default.

STDOUT

       Not used.

STDERR

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES

       None.

EXTENDED DESCRIPTION

       None.

EXIT STATUS

	0     Successful completion.

       >0     The n value was not an unsigned decimal integer greater than or equal to 1.

CONSEQUENCES OF ERRORS

       Default.

       The following sections are informative.

APPLICATION USAGE

       None.

EXAMPLES

	      for i in * do
		  if test -d "$i" then break fi done

RATIONALE

       In early proposals, consideration was given to expanding the syntax of break and continue to refer to a label associated with the appropri-
       ate loop as a preferable alternative to the n method. However, this volume of IEEE Std 1003.1-2001 does reserve the name space  of  command
       names ending with a colon. It is anticipated that a future implementation could take advantage of this and provide something like:

	      outofloop: for i in a b c d e
	      do
		  for j in 0 1 2 3 4 5 6 7 8 9
		  do
		      if test -r "${i}${j}"
		      then break outofloop
		      fi
		  done
	      done

       and that this might be standardized after implementation experience is achieved.

FUTURE DIRECTIONS

       None.

SEE ALSO

       Special Built-In Utilities

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
       and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								 BREAK(1P)