return the natural logarithm of a number

Contract
Return type	wob
No input parameters.

Water Contract
<method number.integer.log/>

See also: log, double

Returns the natural logarithm of a _subject of type integer as a double . Information for the mathematical constant e , on which log is based, is found in the documentation for number.double .

100.<log />

4.605170185988092

integer.<from number.double.e.<power 4.605170185988092 /> />

If the _subject is negative, log returns a value of NaN (not a number).

-100.<log />.<is_nan />

true