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1<!-- Note: This file is automatically generated from source code comments. Changes made in this file will be overridden. -->
2
3# Function atanh
4
5Calculate the hyperbolic arctangent of a value,
6defined as `atanh(x) = ln((1 + x)/(1 - x)) / 2`.
7
8For matrices, the function is evaluated element wise.
9
10
11## Syntax
12
13```js
14math.atanh(x)
15```
16
17### Parameters
18
19Parameter | Type | Description
20--------- | ---- | -----------
21`x` | number &#124; Complex &#124; Array &#124; Matrix | Function input
22
23### Returns
24
25Type | Description
26---- | -----------
27number &#124; Complex &#124; Array &#124; Matrix | Hyperbolic arctangent of x
28
29
30## Examples
31
32```js
33math.atanh(0.5) // returns 0.5493061443340549
34```
35
36
37## See also
38
39[acosh](acosh.md),
40[asinh](asinh.md)