1LOG10(3) Linux Programmer's Manual LOG10(3)
2
3
4
6 log10, log10f, log10l - base-10 logarithmic function
7
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 versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
23
25 These functions return the base 10 logarithm of x.
26
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
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
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 └─────────────────────────────┴───────────────┴─────────┘
50 C99, POSIX.1-2001, POSIX.1-2008.
51
52 The variant returning double also conforms to SVr4, 4.3BSD, C89.
53
55 cbrt(3), clog10(3), exp10(3), log(3), log2(3), sqrt(3)
56
58 This page is part of release 5.10 of the Linux man-pages project. A
59 description of the project, information about reporting bugs, and the
60 latest version of this page, can be found at
61 https://www.kernel.org/doc/man-pages/.
62
63
64
65 2017-09-15 LOG10(3)