log10, log10f, log10l - base-10 logarithmic function
#include <math.h>
double log10(double x);
float log10f(float x);
long double log10l(long double x);
Link with
-lm.
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
log10f(),
log10l():
_ISOC99_SOURCE ||
_POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
These functions return the base 10 logarithm of
x.
On success, these functions return the base 10 logarithm of
x.
For special cases, including where
x is 0, 1, negative, infinity, or NaN,
see
log(3).
See
math_error(7) for information on how to determine whether an error
has occurred when calling these functions.
For a discussion of the errors that can occur for these functions, see
log(3).
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| log10 (), log10f (), log10l () |
Thread safety |
MT-Safe |
C99, POSIX.1-2001, POSIX.1-2008.
The variant returning
double also conforms to SVr4, 4.3BSD, C89.
cbrt(3),
clog10(3),
exp10(3),
log(3),
log2(3),
sqrt(3)