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



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


NNAAMMEE
       break -- exit from for, while, or until loop

SSYYNNOOPPSSIISS
       break [[_n]]

DDEESSCCRRIIPPTTIIOONN
       The _b_r_e_a_k utility shall exit from the smallest enclosing ffoorr, wwhhiillee, or
       uunnttiill 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.

OOPPTTIIOONNSS
       None.

OOPPEERRAANNDDSS
       See the DESCRIPTION.

SSTTDDIINN
       Not used.

IINNPPUUTT FFIILLEESS
       None.

EENNVVIIRROONNMMEENNTT VVAARRIIAABBLLEESS
       None.

AASSYYNNCCHHRROONNOOUUSS EEVVEENNTTSS
       Default.

SSTTDDOOUUTT
       Not used.

SSTTDDEERRRR
       The standard error shall be used only for diagnostic messages.

OOUUTTPPUUTT FFIILLEESS
       None.

EEXXTTEENNDDEEDD DDEESSCCRRIIPPTTIIOONN
       None.

EEXXIITT SSTTAATTUUSS
        0    Successful completion.

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

CCOONNSSEEQQUUEENNCCEESS OOFF EERRRROORRSS
       Default.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

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

RRAATTIIOONNAALLEE
       In early proposals, consideration was given to expanding the syntax of
       _b_r_e_a_k and _c_o_n_t_i_n_u_e to refer to a label associated with the appropriate
       loop as a preferable alternative to the _n method. However, this volume
       of POSIX.1-2008 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:

           oouuttoofflloooopp:: ffoorr ii iinn aa bb cc dd ee
           ddoo
               ffoorr jj iinn 00 11 22 33 44 55 66 77 88 99
               ddoo
                   iiff tteesstt --rr ""$${{ii}}$${{jj}}""
                   tthheenn bbrreeaakk oouuttoofflloooopp
                   ffii
               ddoonnee
           ddoonnee

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

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _S_e_c_t_i_o_n _2_._1_4, _S_p_e_c_i_a_l _B_u_i_l_t_-_I_n _U_t_i_l_i_t_i_e_s

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2013                             BREAK(1)
