LOG

 LOG (number)

 Class:  Elemental function - Generic

 Returns the natural log (base e) of a real or complex argument.

 If the argument is real, its value must be greater than zero.  If
 the argument is complex, its value must not be (0.,0.).
 +------+---------+----------+------------+-------------+        
 | Args | Generic | Specific |  Argument  | Result Type |
 +------+---------+----------+------------+-------------+
 |  1   |  LOG    | ALOG     | REAL*4     | REAL*4      |
 |      |         | DLOG     | REAL*8     | REAL*8      |
 |      |         | QLOG     | REAL*16    | REAL*16     |
 |      |         | CLOG     | COMPLEX*8  | COMPLEX*8   |
 |      |         | CDLOG    | COMPLEX*16 | COMPLEX*16  |
 |      |         | ZLOG     | COMPLEX*16 | COMPLEX*16  |
 |      |         | CQLOG    | COMPLEX*32 | COMPLEX*32  |
 +------+---------+----------+------------+-------------+

 Note: The setting of compiler options specifying real
       size can affect ALOG and CLOG.