Synopsis

float log10f(float x);

Description

log10f computes the base-10 logarithm of x.

If x = 0, errno is set to ERANGE and log10f returns ?HUGE_VALF. If x < 0, errno is set to EDOM and log10f returns ?HUGE_VALF.

If x < 0 or x = ?∞, log10f returns NaN.
If x = 0, log10f returns ?∞.
If x = ∞, log10f returns ∞.
If x = NaN, log10f returns x.