Originální popis anglicky:
log2, log2f, log2l - base-2 logarithmic function
Návod, kniha: Linux Programmer's Manual
#include <math.h>
double log2(double x);
float log2f(float x);
long double log2l(long double x);
Link with -lm.
The
log2() function returns the base 2 logarithm of
x.
The
log2() function can return the following error:
- EDOM
- The argument x is negative.
SVID 3, POSIX, BSD 4.3, ISO 9899. The float and the long double variants are C99
requirements.
cbrt(3),
sqrt(3)
