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NAME

       shift - shift positional parameters

SYNOPSIS

       shift [n]

DESCRIPTION

       The  positional  parameters  shall  be  shifted. Positional parameter 1
       shall be assigned the value of parameter (1+n), parameter  2  shall  be
       assigned  the  value  of  parameter  (2+n),  and  so on. The parameters
       represented by the numbers "$#" down to "$#-n+1" shall  be  unset,  and
       the  parameter  ’#’  is updated to reflect the new number of positional
       parameters.

       The value n shall be an unsigned decimal integer less than or equal  to
       the  value  of the special parameter ’#’ .  If n is not given, it shall
       be assumed to be 1. If n is 0, the positional  and  special  parameters
       are not changed.

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

       The exit status is >0 if n>$#; otherwise, it is zero.

CONSEQUENCES OF ERRORS

       Default.

       The following sections are informative.

APPLICATION USAGE

       None.

EXAMPLES

              $ set a b c d e
              $ shift 2
              $ echo $*
              c d e

RATIONALE

       None.

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 .