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# docs.GL

GLSL 4
GLSL ES 3

# atanh

## Name

atanh — return the arc hyperbolic tangent of the parameter

## Declaration

`genType atanh(` | genType x`)`;

## Parameters

`x`

  Specify the value whose arc hyperbolic tangent to return.

## Description

`atanh` returns the arc hyperbolic tangent of x; the inverse of tanh. Results are undefined if |x|>1.

## Version Support

| OpenGL ES Shading Language Version
--- | ---
Function Name | 1.00 | 3.00 | 3.10
atanh | - | ✔ | ✔

## See Also

sin, cos, sinh, cosh

## Copyright

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. https://opencontent.org/openpub/.

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