log103
Base-10 logarithmic function
Usage
#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)):
log10f(), log10l():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
Library
Math library (libm, -lm)
Overview
These functions return the base-10 logarithm of x.
Return value
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).
Errors
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).
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| log10(), log10f(), log10l() | Thread safety | MT-Safe |
Releases
19 releases since Debian 1.1 (Buzz); the text changed 13 times.