atanh() - Return the hyperbolic Tangent of value as a Argument in Java

1. Forget Code
2. Java
3. atanh() - Return the hyperbolic Tangent of value as a Argument

import java.lang.Math.*;
class Demoatanh
{
double atanh(double x)
{
return 0.5*Math.log( (x + 1.0) / (x - 1.0));
}
public static void main(String args[])
{
Demoatanh d =new Demoatanh();
double x= -2.0;
double res = d.atanh(x);
System.out.println(res );
}
}