GNU/Linux |
CentOS 4.8 |
i386 |
log2f(3) |
log2, log2f, log2l − base-2 logarithmic function
#include <math.h>
double log2(double x);
float log2f(float x);
long double log2l(long double x);
The log2() function returns the natural 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.
sqrt(3), cbrt(3)
log2f(3) |