log10(3) - f38

1log10(3)                   Library Functions Manual                   log10(3)
2
3
4

NAME

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

LIBRARY

9       Math library (libm, -lm)
10

SYNOPSIS

12       #include <math.h>
13
14       double log10(double x);
15       float log10f(float x);
16       long double log10l(long double x);
17
18   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
19
20       log10f(), log10l():
21           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
22               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
23               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
24

DESCRIPTION

26       These functions return the base 10 logarithm of x.
27

RETURN VALUE

29       On success, these functions return the base 10 logarithm of x.
30
31       For  special  cases,  including where x is 0, 1, negative, infinity, or
32       NaN, see log(3).
33

ERRORS

35       See math_error(7) for information on how to determine whether an  error
36       has occurred when calling these functions.
37
38       For  a discussion of the errors that can occur for these functions, see
39       log(3).
40

ATTRIBUTES

42       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
43       tributes(7).
44
45       ┌────────────────────────────────────────────┬───────────────┬─────────┐
46       │Interface                                   │ Attribute     │ Value   │
47       ├────────────────────────────────────────────┼───────────────┼─────────┤
48       │log10(), log10f(), log10l()                 │ Thread safety │ MT-Safe │
49       └────────────────────────────────────────────┴───────────────┴─────────┘
50

STANDARDS

52       C11, POSIX.1-2008.
53

HISTORY

55       C99, POSIX.1-2001.
56
57       The variant returning double also conforms to SVr4, 4.3BSD, C89.
58