GNU/Linux |
CentOS 4.8 |
i386 |
logf(3) |
log, logf, logl − natural logarithmic function
#include <math.h>
double log(double x);
float logf(float x);
long double logl(long double x);
The log() function returns the natural logarithm of x.
The log() function can return the following errors:
EDOM |
The argument x is negative. | ||
ERANGE |
The argument x is zero. The log of zero is not defined (minus infinity). |
SVID 3, POSIX, BSD 4.3, ISO 9899. The float and the long double variants are C99 requirements.
sqrt(3), cbrt(3)
logf(3) |