log2(3) Library Functions Manual log2(3) log2, log2f, log2l - 2 LIBRARY Math library (libm, -lm) #include double log2(double x); float log2f(float x); long double log2l(long double x); glibc (. feature_test_macros(7)): log2(), log2f(), log2l(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L 2 x. 2 x. , x 0, 1, , NaN, log(3). math_error(7), , . , , log(3). attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |log2(), log2f(), log2l() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. glibc 2.1. C99, POSIX.1-2001. , double, SVr4, 4.3BSD. . cbrt(3), clog2(3), log(3), log10(3), sqrt(3) Artyom Kunyov , Azamat Hackimov , Dmitry Bolkhovskikh , Katrin Kutepova , Konstantin Shvaykovskiy , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . log2(3)