The GNU Fortran Compiler: SIZE

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### 9.242 `SIZE` — Determine the size of an array

Description:

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

Standard:

  Fortran 95 and later, with KIND argument Fortran 2003 and later

Class:

  Inquiry function

Syntax:

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

Arguments:

  ARRAY | Shall be an array of any type. If ARRAY is a pointer it must be associated and allocatable arrays must be allocated.
  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 ARRAY.
  KIND | (Optional) An `INTEGER` initialization expression indicating the kind parameter of the result.

Return value:

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

Example:

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

See also:

  SHAPE, RESHAPE