# How to Remove Digits After Decimal in Javascript

In this tutorial, you will learn how to remove digits after decimal in javascript. The number whose whole number part and the fractional part are separated by a decimal point is known as a decimal number. For example, 6.58 is a decimal number where 6 is the whole number and .58 is the fractional part.

Removing digits after the decimal is very easy, but it can be tricky if the number is coming from an input field because the value present in the input field is of string type. So first, we have to convert it into a number type using the Number() method and then perform any sort of calculations.

To remove the fractional part in the decimal number, we can make use of the Math object.  This object contains a lot of methods and properties which can help us in various mathematical operations. One of those methods is the floor() 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 remove digits after the decimal and display the whole number 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 passing the value of the input element to the Number() method and storing the number in the num variable.
• We are calling the floor() method to get rid of decimal values in the num 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");

let num = Number(input.value);
let result = Math.floor(num);
output.innerText = result;
});