xtd 0.2.0
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◆ log() [1/2]

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

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

Parameters
valueA 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.