SIZEOF (arg)

  Class:  Elemental function - Specific

  Returns the number of bytes of storage used by the argument.
  +------+---------+----------+------------------+-------------+
  | Args | Generic | Specific |    Argument      | Result Type |
  +------+---------+----------+------------------+-------------+
  |   1  |   --    | SIZEOF   | Anything with a  | INTEGER*8   |
  |      |         |   --     | valid data type, |             |
  |      |         |          | except assumed-  |             |
  |      |         |          | size arrays.     |             |
  +------+---------+----------+------------------+-------------+

  This function cannot be passed as an actual argument.