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

.. index:: SIZE, array, size, array, number of elements, array, count elements

.. _size:

SIZE --- Determine the size of an array
***************************************

.. function:: SIZE(ARRAY, DIM , KIND)

  Determine the extent of :samp:`{ARRAY}` along a specified dimension :samp:`{DIM}`,
  or the total number of elements in :samp:`{ARRAY}` if :samp:`{DIM}` is absent.

  :param ARRAY:
    Shall be an array of any type. If :samp:`{ARRAY}` is
    a pointer it must be associated and allocatable arrays must be allocated.

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

  :param KIND:
    (Optional) An ``INTEGER`` initialization
    expression indicating the kind parameter of the result.

  :return:
    The return value is of type ``INTEGER`` and of kind :samp:`{KIND}`. If
    :samp:`{KIND}` is absent, the return value is of default integer kind.

  Standard:
    Fortran 90 and later, with :samp:`{KIND}` argument Fortran 2003 and later

  Class:
    Inquiry function

  Syntax:
    .. code-block:: fortran

      RESULT = SIZE(ARRAY[, DIM [, KIND]])

  Example:
    .. code-block:: fortran

      PROGRAM test_size
        WRITE(*,*) SIZE((/ 1, 2 /))    ! 2
      END PROGRAM

  See also:
    :ref:`SHAPE`,
    :ref:`RESHAPE`