# JavaScript | Math.cosh() function

Math.cosh() is an inbuilt function in JavaScript which is used to calculate the value of hyperbolic cosine of a number.

Syntax:

`Math.cosh(p)`

Parameter:

• Here the parameter p is a number for which the value of hyperbolic cosine is going to be calculated.
• Return value:

• It returns the calculated value of hyperbolic cosine of the number.

Examples:

```Input:
Math.cosh(0)
Output:
1
```

Explanation:
Here formula for calculating hyperbolic cosine of any number is : The number e is a mathematical constant having an approximate value equal to 2.718.

In the same way hyperbolic cosine of any number can be calculated just after replacing p with the desired number.

```Input:
Math.cosh(12)
Output:
81377.39571257407
```

Explanation:
Here same as above calculation, when we put 12 instead of p then the value becomes as output shown above.

Let’s see some JavaScript code:

 `// Printing hyperbolic cosine of some numbers ` `// taken as paramter of Math.cosh() function. ` `console.log(Math.cosh(0)); ` `console.log(Math.cosh(1)); ` `console.log(Math.cosh(0)); ` `console.log(Math.cosh(22)); ` `console.log(Math.cosh(-2)); ` `console.log(Math.cosh(4)); `

Output:

```> 1
> 1.5430806348152437
> 1
> 1792456423.065796
> 3.7621956910836314
> 27.308232836016487
```

Errors and Exceptions:

1. It is an error case because complex number can not be taken as the parameter of the function only integer value can be taken as the parameter.
 `// complex number can not be calculated as the hyperbolic cosine. ` `console.log(Math.cosh(1 + 2i)); `

Output:

`Error: Invalid or unexpected token`
2. Other than integer nothing is accepted as the parameter of the function that is why here string as the parameter gives NaN i.e, not a number.
 `// 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.cosh(``"geeksforgeeks"``)); ` `console.log(Math.cosh(``"gfg"``)); `

Output:

```> NaN
> NaN
```

Application:

• Its practical application is that whenever we need to find the value of hyperbolic cosine of a number that time we take the help of Math.cosh() function in JavaScript.
 `// Printing hyperbolic cosine of some numbers from 0 to 9 ` `// taken as paramter of Math.cosh() function. ` `for` `(i = 0; i < 10; i++) { ` `    ``console.log(Math.cosh(i)); ` `    ``+``"
"``; ` `} `

Output:

```> 1
> 1.5430806348152437
> 3.7621956910836314
> 10.067661995777765
> 27.308232836016487
> 74.20994852478785
> 201.7156361224559
> 548.317035155212
> 1490.479161252178
> 4051.5420254925943```