1log10(3) Library Functions Manual log10(3)
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6 log10, log10f, log10l - base-10 logarithmic function
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9 Math library (libm, -lm)
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12 #include <math.h>
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14 double log10(double x);
15 float log10f(float x);
16 long double log10l(long double x);
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18 Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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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
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26 These functions return the base 10 logarithm of x.
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29 On success, these functions return the base 10 logarithm of x.
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31 For special cases, including where x is 0, 1, negative, infinity, or
32 NaN, see log(3).
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35 See math_error(7) for information on how to determine whether an error
36 has occurred when calling these functions.
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38 For a discussion of the errors that can occur for these functions, see
39 log(3).
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42 For an explanation of the terms used in this section, see at‐
43 tributes(7).
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45 ┌────────────────────────────────────────────┬───────────────┬─────────┐
46 │Interface │ Attribute │ Value │
47 ├────────────────────────────────────────────┼───────────────┼─────────┤
48 │log10(), log10f(), log10l() │ Thread safety │ MT-Safe │
49 └────────────────────────────────────────────┴───────────────┴─────────┘
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52 C11, POSIX.1-2008.
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55 C99, POSIX.1-2001.
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57 The variant returning double also conforms to SVr4, 4.3BSD, C89.
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60 cbrt(3), clog10(3), exp10(3), log(3), log2(3), sqrt(3)
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64Linux man-pages 6.05 2023-07-20 log10(3)