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log10(3) — Linux manual page

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

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)

COLOPHON         top

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Linux man-pages 6.9.1          2024-05-02                       log10(3)

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

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