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# std::atanh

From cppreference.com
< cpp‎ | numeric‎ | math

Defined in header `<cmath>` |  |
float atanh( float arg ); |  | (since C++11)
double atanh( double arg ); |  | (since C++11)
long double atanh( long double arg ); |  | (since C++11)
double atanh( Integral arg ); |  | (since C++11)

Computes hyperbolic area tangent of `arg`.

### [edit] Parameters

arg | - | value of a floating-point or Integral type

### [edit] Return value

Inverse hyperbolic tangent of `arg`.

### [edit] See also

asinh (C++11) | area hyperbolic sine (function) [edit]
acosh (C++11) | area hyperbolic cosine (function) [edit]
tanh | hyperbolic tangent (function) [edit]
atanh(std::complex) (C++11) | computes area hyperbolic tangent of a complex number (function template) [edit]
C documentation for atanh

### [edit] External links

Weisstein, Eric W. "Inverse Hyperbolic Tangent." From MathWorld--A Wolfram Web Resource.

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