# JavaScript Math.floor() | Round Down to nearest integer

The JavaScript Math.floor() method is used when we need to round a number to its nearest smallest integer. For example:

HTML with JavaScript Code
```<!DOCTYPE html>
<html>
<body>

<p id="xyz"></p>

<script>
let num = 0.01;
document.getElementById("xyz").innerHTML = Math.floor(num);
</script>

</body>
</html>```
Output

## JavaScript Math.floor() Syntax

The syntax of Math.floor() method in JavaScript is:

`Math.floor(x)`

The parameter x is required, refers to a number, which is going to round Down to its nearest integer value.

## JavaScript Math.floor() Example

HTML with JavaScript Code
```<!DOCTYPE html>
<html>
<body>

<p>Math.floor(-5.01) = <span id="span1"></span></p>
<p>Math.floor(-5.4) = <span id="span2"></span></p>
<p>Math.floor(-5.5) = <span id="span3"></span></p>
<p>Math.floor(-5.9) = <span id="span4"></span></p>
<p>Math.floor(0) = <span id="span5"></span></p>
<p>Math.floor(5.01) = <span id="span6"></span></p>
<p>Math.floor(5.4) = <span id="span7"></span></p>
<p>Math.floor(5.5) = <span id="span8"></span></p>
<p>Math.floor(5.9) = <span id="span9"></span></p>

<script>
document.getElementById("span1").innerHTML = Math.floor(-5.01);
document.getElementById("span2").innerHTML = Math.floor(-5.4);
document.getElementById("span3").innerHTML = Math.floor(-5.5);
document.getElementById("span4").innerHTML = Math.floor(-5.9);
document.getElementById("span5").innerHTML = Math.floor(0);
document.getElementById("span6").innerHTML = Math.floor(5.01);
document.getElementById("span7").innerHTML = Math.floor(5.4);
document.getElementById("span8").innerHTML = Math.floor(5.5);
document.getElementById("span9").innerHTML = Math.floor(5.9);
</script>

</body>
</html>```
Output

Math.floor(-5.01) =

Math.floor(-5.4) =

Math.floor(-5.5) =

Math.floor(-5.9) =

Math.floor(0) =

Math.floor(5.01) =

Math.floor(5.4) =

Math.floor(5.5) =

Math.floor(5.9) =

Please note: -6 is smaller than -5.01, -5.4, 5.5, and -5.9.

### Other methods to do similar job

Here are the list of methods that are used to either round a number in other way, or to do similar type of job.

• Math.ceil() - round a number up to its nearest largest integer.
• Math.round() - round a specified number to its nearest integer value.
• toFixed() - round a number to particular number of decimals.
• toPrecision() - format a number to specific length.
• Math.trunc() - find the integer part of a number.

JavaScript Online Test

« Previous Tutorial Next Tutorial »

Liked this article? Share it!

Like/follow us on social media for updates!