1LOG10(3)                   Linux Programmer's Manual                  LOG10(3)
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NAME

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

9       #include <math.h>
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11       double log10(double x);
12       float log10f(float x);
13       long double log10l(long double x);
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15       Link with -lm.
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17   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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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
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DESCRIPTION

25       These functions return the base 10 logarithm of x.
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RETURN VALUE

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

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

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

CONFORMING TO

50       C99, POSIX.1-2001, POSIX.1-2008.
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52       The variant returning double also conforms to SVr4, 4.3BSD, C89.
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SEE ALSO

55       cbrt(3), clog10(3), exp10(3), log(3), log2(3), sqrt(3)
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COLOPHON

58       This  page  is  part of release 4.15 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/.
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65                                  2017-09-15                          LOG10(3)
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