7.12.5.3 The atanh functions

Synopsis

1

#include <math.h>
double atanh(double x);
float atanhf(float x);
long double atanhl(long double x);

Description

2

The atanh functions compute the arc hyperbolic tangent of x. A domain error occurs for arguments not in the interval [-1, +1]. A range error may occur if the argument equals -1 or +1.

Returns

3

The atanh functions return artanh x.