# JavaScript Math atanh( ) Method

Below is the example of the Math atanh() Method.

• Example:

 `<``script` `type``=``"text/javascript"``> ` `       ``document.write("When 1 is passed as a parameter: "  ` `                     ``+ Math.atanh(1)); ` ` `

• Output:
`When 1 is passed as a parameter: Infinity`

The Math.atanh() method is used to return the hyperbolic arctangent of a number. The atanh() is a static method of Math, therefore it is always used as Math.atanh(), rather than as a method of a Math object created.

Math.atanh (x) = arctanh(x) = y such that tanh (y) = x

Syntax:

`Math.atanh(value)`

Parameters: This method accepts a single parameter as mentioned above and described below:

• value: This parameter holds the number whose hyperbolic arc-tangent you want to know.

Returns: It returns the hyperbolic arc-tangent of the given number.

Below examples illustrate the Math atanh( ) method in JavaScript

• Example 1:
```Input : Math.atanh(1)
Output : Infinity```
• Example 2:
```Input : Math.atanh(0)
Output : 0```
• Example 3:
```Input : Math.atanh(2)
Output : NaN```
• Example 4:
```Input : Math.atanh(0.5)
Output : 0.5493061443340548```

More example codes for the above method are as follows:

Pogram 1:

 `<``script` `type``=``"text/javascript"``> ` `       ``document.write("When 0 is passed as a parameter: "  ` `       ``+ Math.atanh(0)); ` ` `

Output:

`When 0 is passed as a parameter: 0`

Program 2:

 `<``script` `type``=``"text/javascript"``> ` `        ``document.write("When 2 is passed as a parameter: "  ` `        ``+ Math.atanh(2)); ` ` `

Output:

`When 2 is passed as a parameter: NaN`

Program 3:

 `<``script` `type``=``"text/javascript"``> ` `        ``document.write("When 0.5 is passed as a parameter: "  ` `        ``+ Math.atanh(0.5)); ` ` `

Output:

`When 0.5 is passed as a parameter: 0.5493061443340548`

Supported Browsers:

• Internet Explorer 12.0
• Firefox 25.0
• Opera 25.0
• Safari 8.0 My Personal Notes arrow_drop_up If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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