Sfun.Log1p Method

Returns log(1+x), the logarithm of (x plus 1).

public static double Log1p(
double x
);

A double value representing Log(1+x).

Specifically:

${\rm Log1p}(\pm 0)$ returns $\pm 0$ .

${\rm Log1p}(-1)$ returns $-\infty$ .

${\rm Log1p}(x)$ returns NaN, if $x \lt -1$ .

${\rm Log1p}(\pm \infty)$ returns $\pm \infty$ .