NAME
log1p - logarithm of 1 plus argument
SYNOPSIS
#include <math.h>
I double log1p(double x );
I float log1pf(float x );
I long double log1pl(long double x );
Compile with
-std=c99; link with
-lm.
DESCRIPTION
I 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.
CONFORMING TO
BSD, C99.
The
float
and
long double
variants are C99 requirements.
SEE ALSO
