log() [1/2]

static double xtd::math::log ( double  value )

static

Returns the natural (base e) logarithm of a specified number.

Parameters

value

A number whose logarithm is to be found.

Returns

One of the values in the following table.

value parameter	Return value
Positive	The natural logarithm of d; that is, ln value, or log e value
Zero	xtd::math::negative_infinity
Negative	xtd::math::NaN
Equal to xtd::math::NaN	xtd::math::NaN
Equal to xtd::math::positive_infinity	xtd::math::positive_infinity

Remarks

Parameter value is specified as a base 10 number.