log10(3) — Linux manual page


LOG10(3)                  Linux Programmer's Manual                 LOG10(3)

NAME         top

       log10, log10f, log10l -  base-10 logarithmic function

SYNOPSIS         top

       #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

DESCRIPTION         top

       These functions return the base 10 logarithm of x.

RETURN VALUE         top

       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         top

       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         top

       For an explanation of the terms used in this section, see

       │Interface                    Attribute     Value   │
       │log10(), log10f(), log10l()  │ Thread safety │ MT-Safe │

CONFORMING TO         top

       C99, POSIX.1-2001, POSIX.1-2008.

       The variant returning double also conforms to SVr4, 4.3BSD, C89.

SEE ALSO         top

       cbrt(3), clog10(3), exp10(3), log(3), log2(3), sqrt(3)

COLOPHON         top

       This page is part of release 5.09 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at

                                 2017-09-15                         LOG10(3)

Pages that refer to this page: exp10(3)exp10f(3)exp10l(3)log2(3)log2f(3)log2l(3)log(3)logf(3)logl(3)