CentOS 4.8

GNU/Linux	CentOS 4.8	i386
	log1p(3)

LOG1P

NAME

log1p − logarithm of 1 plus argument

#include <math.h>

double log1p(double x);

float log1pf(float x);

long double log1pl(long double x);

log1p(x) returns a value equivalent to ’log (1 + x)’. It is computed in a way that is accurate even if the value of x is near zero.

BSD, C99. The float and the long double variants are C99 requirements.