# How to Get Number of Decimal Places in Javascript

In this tutorial, you will learn how to get number of decimal places in javascript. In a decimal number, the whole number part and the fractional part are separated by a decimal point. For example, 7.6235 is a decimal number where 7 is the whole number and 6235 is the decimal part. The number of decimal places is 4.

To get the number of decimal places in the decimal number, we can make use of the `split()` method and the `length` property. This method and property are only available for strings, so if the value is of number type, then we have to convert it into string type using the `toString()` method.

In the following example, we have an input field in which we will enter a random decimal number. Upon click of a button, we will get the number of decimal places and display that on the screen.  Please have a look over the code example and the steps given below.

HTML & CSS

• We have 4 elements in the HTML file (`div`, `input`, `button`, and `h1`). The `div` element is just a wrapper for the rest of the elements.
• The `innerText` for the `button` element is `“Get”` and for the `h1` element, it is `“Result”`.
• We have done some basic styling using CSS and added the link to our `style.css` stylesheet inside the `head` element.
• We have also included our javascript file `script.js` with a `script` tag at the bottom.
```<!DOCTYPE html>
<html lang="en">

<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>

<body>

<div class="container">
<input type="number" placeholder="Enter Number">
<button>Get</button>
<h1>Result</h1>
</div>

<script src="script.js"></script>
</body>

</html>```
```.container {
text-align: center;
}

button {
margin-top: 10px;
}

input {
display: block;
margin: 10px auto;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
-webkit-appearance: none;
margin: 0;
}```

Javascript

• We have selected the `input` element, `button` element, and `h1` element using the `document.querySelector()` method and stored them in `input`, `btnGet`, and `output` variables respectively.
• We have attached a `click` event listener to the `button` element.
• In the event handler function, we are getting the value from the `input` element using `value` property and storing that in the `num` variable. Since it is coming from an `input` element, it is by default of string type.
• We are calling the `split()` method to split `num` into two parts and storing the second part in the `decimals` variable.
• We are using the `length` property to get the number of decimal places and storing that in the `result` variable.
• We are displaying the `result` in the `h1` element using the `innerText` property.
```let input = document.querySelector("input");
let btnGet = document.querySelector("button");
let output = document.querySelector("h1");