1LOG10(3)                   Linux Programmer's Manual                  LOG10(3)
2
3
4

NAME

6       log10, log10f, log10l -  base-10 logarithmic function
7

SYNOPSIS

9       #include <math.h>
10
11       double log10(double x);
12       float log10f(float x);
13       long double log10l(long double x);
14
15       Link with -lm.
16
17   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
18
19       log10f(), log10l():
20           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
21               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
22               || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
23

DESCRIPTION

25       These functions return the base 10 logarithm of x.
26

RETURN VALUE

28       On success, these functions return the base 10 logarithm of x.
29
30       For  special  cases,  including where x is 0, 1, negative, infinity, or
31       NaN, see log(3).
32

ERRORS

34       See math_error(7) for information on how to determine whether an  error
35       has occurred when calling these functions.
36
37       For  a discussion of the errors that can occur for these functions, see
38       log(3).
39

ATTRIBUTES

41       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
42       tributes(7).
43
44       ┌────────────────────────────────────────────┬───────────────┬─────────┐
45       │Interface                                   │ Attribute     │ Value   │
46       ├────────────────────────────────────────────┼───────────────┼─────────┤
47       │log10(), log10f(), log10l()                 │ Thread safety │ MT-Safe │
48       └────────────────────────────────────────────┴───────────────┴─────────┘
49

CONFORMING TO

51       C99, POSIX.1-2001, POSIX.1-2008.
52
53       The variant returning double also conforms to SVr4, 4.3BSD, C89.
54

SEE ALSO

56       cbrt(3), clog10(3), exp10(3), log(3), log2(3), sqrt(3)
57

COLOPHON

59       This  page  is  part of release 5.12 of the Linux man-pages project.  A
60       description of the project, information about reporting bugs,  and  the
61       latest     version     of     this    page,    can    be    found    at
62       https://www.kernel.org/doc/man-pages/.
63
64
65
66                                  2021-03-22                          LOG10(3)
Impressum