# JavaScript | Math.E() function

The Math.E() is an inbuilt function in JavaScript which is used to get the value of ep, where p is any given number.
The number e is a mathematical constant having an approximate value equal to 2.718.

• It was discovered by the Swiss mathematician Jacob Bernoulli.
• This number is also called Euler’s number.

Syntax:

`Math.exp(p)`

Parameter: This funcion accepts a sinlge parameter p is any number.

Return Value: It return the value of ep, where p is any given number as parameter.

Example:

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

Explanation:
Here the value of parameter p is 0, So after putting the value 0 instead of p in ep
then its value becomes 1.

```Input  : Math.exp(2)
Output : 7.38905609893065
```

Explanation:
Here the value of parameter p is 2, So after putting the value 2 instead of p in ep
then its value becomes 7.38905609893065.

Let’s see JavaScript program:

• Example 1:

 ` `

Output:

```1
2.718281828459045
7.38905609893065
0.36787944117144233
0.0009118819655545162
22026.465794806718
3.3201169227365472
```
• Example 2: Here parameter should must be a number otherwise it give error or NaN i.e, not a number.

 ` `

Output:

`Error: a is not defined`

 ` `

Output:

`NaN`
• Supported Browsers: The browsers supported by JavaScript Math.E() function are listed below:

• Internet Explorer
• Firefox
• Opera
• Safari My Personal Notes arrow_drop_up Check out this Author's contributed articles.

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Improved By : Akanksha_Rai