atanh() [5/11]

template<typename T , require_arithmetic_t< T > * = nullptr>

double stan::math::atanh ( const T  x )

inline

Return the inverse hyperbolic tangent of the specified value.

An argument of -1 returns negative infinity and an argument of 1 returns infinity. Returns nan for nan argument.

Parameters

[in]

x

Arithmetic Argument.

Returns

Inverse hyperbolic tangent of the argument.

Exceptions

std::domain_error

If argument is not in [-1, 1].

Definition at line 28 of file atanh.hpp.