Section 11,75: REAL

 REAL (number)

 A function that converts the argument to a real value.
 +------+---------+----------+------------+-------------+        
 | Args | Generic | Specific |  Argument  | Result Type |
 +------+---------+----------+------------+-------------+
 |  1   |  REAL   |  --      | INTEGER*1  | REAL*4      |
 |      |         | FLOATI   | INTEGER*2  | REAL*4      |
 |      |         | FLOATJ   | INTEGER*4  | REAL*4      |
 |      |see note | FLOATK   | INTEGER*8  | REAL*4      |
 |      |         |  --      | REAL*4     | REAL*4      |
 |      |         | SNGL     | REAL*8     | REAL*4      |
 |      |see note | SNGLQ    | REAL*16    | REAL*4      |
 |      |         |  --      | COMPLEX*8  | REAL*4      |
 |      |         |  --      | COMPLEX*16 | REAL*4      |
 +------+---------+----------+------------+-------------+

 NOTE: FLOATK is only available on AXP systems.
       SNGLQ is not available in DEC Fortran.

 REAL is also a specific name for a function that returns the real
 part of a complex number.  The argument must be a COMPLEX*8 data
 type.  The result is a REAL*4 data type.

 The setting of -r8 affects REAL.