Man Break en anglais
BREAK(P)                   POSIX Programmer's Manual                  BREAK(P)



 

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  specified.
       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 appropriate
       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 Technology
       -- 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(P)