log
log
Natural logarithm
float **log** float $num float $base
If the optional parameter is specified,
returns log
, otherwise
returns the natural logarithm of .
base``log``num``log``num
numThe value to calculate the logarithm for
baseThe optional logarithmic base to use
(defaults to 'e' and so to the natural logarithm).
The logarithm of to
, if given, or the
natural logarithm.
num``base
log10``exp``pow``error_log