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# JavaScript Math tanh() Method

Javascript Math.tanh() method is used to calculate the value of the hyperbolic tangent of a number.

Syntax:

`Math.tanh(x)`

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

• x: which is a number for which the value of hyperbolic tangent is going to be calculated.

Return value: It returns the calculated value of the hyperbolic tangent of the number.< Below example illustrate the Math.tanh() method in JavaScript:

Example: Here formula for calculating the hyperbolic tangent of any number e is a mathematical constant having an approximate value equal to 2.718.

```Input :Math.tanh(0)
Output : 0```

Example: In the same way hyperbolic tangent of any number can be calculated just after replacing p with the desired number. Here the same as the above calculation, when we put 18 instead of x then the value becomes as output shown above.

```Input : Math.tanh(18)
Output : 0.9999999999999996```

Example: Below is an example of the Math.tanh() Method.

## javascript

 `// Printing hyperbolic tangent of some numbers``// taken as parameter of Math.tanh() function.``console.log(Math.tanh(0));``console.log(Math.tanh(1));``console.log(Math.tanh(5));``console.log(Math.tanh(22));``console.log(Math.tanh(-2));``console.log(Math.tanh(4));`

Output:

```0
0.7615941559557649
0.9999092042625951
1
-0.9640275800758169
0.999329299739067```

Example: It is an error case because the complex number can not be taken as the parameter of the function only integer value can be taken as the parameter.

## javascript

 `// complex number can not be calculated``// as the hyperbolic tangent.``console.log(Math.tanh(1 + 2i));`

Output:

`Error: Invalid or unexpected token`

Example: Other than integer nothing is accepted as the parameter of the function which is why here string as the parameter gives NaN i.e, not a number.

## javascript

 `// Any string value as the parameter of the function``// gives NaN i.e, not a number``// because only number can be used as the parameters.``console.log(Math.tanh(``"geeksforgeeks"``));``console.log(Math.tanh(``"gfg"``));`

Output:

```NaN
NaN```

Example: Its practical application is that whenever we need to find the value of the hyperbolic tangent of a number that time we take the help of Math.tanh() function in JavaScript.

## javascript

 `// Printing hyperbolic tangent of some``// numbers from 0 to 9``// taken as parameter of Math.tanh() function.``for` `(i = 0; i < 10; i++) {``    ``console.log(Math.tanh(i));``}`

Output:

```0
0.7615941559557649
0.9640275800758169
0.9950547536867305
0.999329299739067
0.9999092042625951
0.9999877116507956
0.9999983369439447
0.9999997749296758
0.999999969540041```

Supported Browsers:

• Google Chrome 38 and above
• Firefox 25 and above
• Opera 25 and above
• Safari 8 and above
• Edge 12 and above

We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.