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# shift

Perl 5 version 12.2 documentation
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# shift

Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage

- shift ARRAY

- shift

  Shifts the first value of the array off and returns it, shortening the array by 1 and moving everything down. If there are no elements in the array, returns the undefined value. If ARRAY is omitted, shifts the `@_` array within the lexical scope of subroutines and formats, and the `@ARGV` array outside a subroutine and also within the lexical scopes established by the `eval STRING` , `BEGIN {}` , `INIT {}` , `CHECK {}` , `UNITCHECK {}` and `END {}` constructs.

  See also `unshift`, `push`, and `pop`. `shift` and `unshift` do the same thing to the left end of an array that `pop` and `push` do to the right end.