..
  Copyright 1988-2022 Free Software Foundation, Inc.
  This is part of the GCC manual.
  For copying conditions, see the copyright.rst file.

.. index:: IALL, array, AND, bits, AND of array elements

.. _iall:

IALL --- Bitwise AND of array elements
**************************************

.. function:: IALL(ARRAY, DIM, MASK)

  Reduces with bitwise AND the elements of :samp:`{ARRAY}` along dimension :samp:`{DIM}`
  if the corresponding element in :samp:`{MASK}` is ``TRUE``.

  :param ARRAY:
    Shall be an array of type ``INTEGER``

  :param DIM:
    (Optional) shall be a scalar of type
    ``INTEGER`` with a value in the range from 1 to n, where n
    equals the rank of :samp:`{ARRAY}`.

  :param MASK:
    (Optional) shall be of type ``LOGICAL``
    and either be a scalar or an array of the same shape as :samp:`{ARRAY}`.

  :return:
    The result is of the same type as :samp:`{ARRAY}`.

  Standard:
    Fortran 2008 and later

  Class:
    Transformational function

  Syntax:
    .. code-block:: fortran

      RESULT = IALL(ARRAY[, MASK])
      RESULT = IALL(ARRAY, DIM[, MASK])

  Example:
    .. code-block:: fortran

      PROGRAM test_iall
        INTEGER(1) :: a(2)

        a(1) = b'00100100'
        a(2) = b'01101010'

        ! prints 00100000
        PRINT '(b8.8)', IALL(a)
      END PROGRAM

  See also:
    :ref:`IANY`,
    :ref:`IPARITY`,
    :ref:`IAND`