log10, log10f, log10l - base-10 logarithmic function
#include <math.h> double log10(double x); float log10f(float x); long double log10l(long double x);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
These functions return the base 10 logarithm of
On success, these functions return the base 10 logarithm of
For special cases, including where
x is 0, 1, negative,
infinity, or NaN, see log(3).
C99, POSIX.1-2001, POSIX.1-2008.
The variant returning
double also conforms to SVr4, 4.3BSD,
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