JavaScript Math.floor()

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Examples

let x = Math.floor(1.6);

let a = Math.floor(0.60);
let b = Math.floor(0.40);
let c = Math.floor(5);
let d = Math.floor(5.1);
let e = Math.floor(-5.1);
let f = Math.floor(-5.9);

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Description

The Math.floor() method rounds a number DOWN to the nearest integer.

JavaScript Rounding Functions

The Math.abs() Method
The Math.ceil() Method
The Math.floor() Method
The Math.round() Method
The Math.fround() Method
The Math.trunc() Method

Syntax

Math.floor(x)

Parameters

Parameter	Description
x	Required. A number.

Return Value

Type	Description
Number	The nearest integer to the number, rounding DOWN.

JavaScript Math

JavaScript Numbers

JavaScript Number Reference

Browser Support

Math.floor() is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes