Section 11,41: IDINT

 IDINT (number)

 A function that 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   | IDINT   | IIDINT   | REAL*8     | INTEGER*2   |
 |      |         | JIDINT   | REAL*8     | INTEGER*4   |
 |      |see note | KIDINT   | REAL*4     | INTEGER*8   |
 +------+---------+----------+------------+-------------+

 NOTE: KIDINT is only available on AXP systems.

 The setting of -noi4 or -i8 (AXP only) affects IDINT.

 See also the INT intrinsic function.