log10(3) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO

log10(3)                Library Functions Manual                log10(3)

NAME         top

       log10, log10f, log10l -  base-10 logarithmic function

LIBRARY         top

       Math library (libm, -lm)

SYNOPSIS         top

       #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

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
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           Attribute     Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ log10(), log10f(), log10l()         │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       C99, POSIX.1-2001.

       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)

Linux man-pages (unreleased)     (date)                         log10(3)

Pages that refer to this page: exp10(3)log2(3)log(3)