log10(3) Library Functions Manual log10(3) NAME log10, log10f, log10l - base-10 logarithmic function LIBRARY Math library (libm, -lm) SYNOPSIS #include <math.h> double log10(double x); float log10f(float x); long double log10l(long double x); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): log10f(), log10l(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE DESCRIPTION These functions return the base 10 logarithm of x. RETURN VALUE On success, these functions return the base 10 logarithm of x. For special cases, including where x is 0, 1, negative, infinity, or NaN, see log(3). ERRORS See math_error(7) for information on how to determine whether an error has occurred when calling these functions. For a discussion of the errors that can occur for these functions, see log(3). ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │log10(), log10f(), log10l() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS C99, POSIX.1-2001, POSIX.1-2008. The variant returning double also conforms to SVr4, 4.3BSD. SEE ALSO cbrt(3), clog10(3), exp10(3), log(3), log2(3), sqrt(3) Linux man-pages 6.03 2023-02-05 log10(3)
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