Natural logarithm.
Elemental function
Same as X.
The -qxlf2003=signdzerointr option controls whether you get Fortran 2003 behavior. See qxlf2003 in the XL Fortran Compiler Reference
If the argument type is complex, the result is the principal value of the imaginary part OMEGA in the range -PI < OMEGA ≤ PI. If the real part of the argument is less than zero and its imaginary part is zero, the imaginary part of the result approximates PI.
If the argument type is complex, the result is the principal value of the imaginary part OMEGA in the range -PI < OMEGA ≤ PI. If the real part of the argument is less than zero and its imaginary part is zero, the imaginary part of the result approximates PI if the imaginary part of X is positive real zero. If the imaginary part of X is negative real zero, the imaginary part of the result approximates -PI
LOG (10.0) has the value 2.3025851 (approximately).
Specific Name | Argument Type | Result Type | Pass As Arg? |
---|---|---|---|
ALOG | default real | default real | yes |
DLOG | double precision real | double precision real | yes |
QLOG | REAL(16) | REAL(16) | yes 1 |
CLOG | default complex | default complex | yes |
CDLOG | double complex | double complex | yes 1 |
ZLOG | double complex | double complex | yes 1 |
CQLOG | COMPLEX(16) | COMPLEX(16) | yes 1 |
Note:
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