If the optional base parameter is specified,
log returns logbasearg, otherwise log
returns the natural logarithm of arg.
Parameters
arg
The value to calculate the logarithm for
base
The optional logarithmic base to use
(defaults to 'e' and so to the natural logarithm).
Return Values
The logarithm of arg to
base, if given, or the
natural logarithm.
Changelog
Version
Description
4.3.0
The optional parameter base became available.
For older versions you can calculate the logarithm in base b
of a number n, but using the mathematical identity:
logb(n) = log(n)/log(b), where log is the
neperian (or natural) logarithm.