AINT (real-number[,kind])

  Class:  Elemental function - Generic

  Returns the largest integer whose absolute value does not exceed
  the absolute value of the argument and has the same sign as the
  argument.

  +------+---------+----------+------------+-------------+
  | Args | Generic | Specific |  Argument  | Result Type |
  +------+---------+----------+------------+-------------+
  |  1   |  AINT   | AINT     | REAL*4     | REAL*4      |
  |      |         | DINT     | REAL*8     | REAL*8      |
  |      |         | QINT     | REAL*16    | REAL*16     |
  +------+---------+----------+------------+-------------+