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

None.

STDIN

None.

INPUT FILES

None.

ENVIRONMENT VARIABLES

None.

ASYNCHRONOUS EVENTS

None.

STDOUT

None.

STDERR

None.

OUTPUT FILES

None.

EXTENDED DESCRIPTION

None.

EXIT STATUS

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

CONSEQUENCES OF ERRORS

None.

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

CHANGE HISTORY

None.