..
  Copyright 1988-2021 Free Software Foundation, Inc.
  This is part of the GCC manual.
  For copying conditions, see the GPL license file

.. _size:

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

.. index:: SIZE

.. index:: array, size

.. index:: array, number of elements

.. index:: array, count elements

.. function:: SIZE

  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.

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

  :samp:`{Class}:`
    Inquiry function

  :samp:`{Syntax}:`

  .. code-block:: fortran

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

  :samp:`{Example}:`

    .. code-block:: fortran

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

  :samp:`{See also}:`
    SHAPE, 
    RESHAPE