JavaScript ceil() method

Definition and usage

ceil() The method rounds a number up to the nearest integer and returns the result.

If the passed parameter is an integer, the value will not be rounded.

Description

ceil() The method performs a ceiling calculation and returns the integer that is greater than or equal to the function parameter and closest to it.

Example

Example 1

Round a number up to its nearest integer:

Math.ceil(1.4)

Try it yourself

Example 2

Use the ceil() method for different numbers:

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

The results for a, b, c, d, e, and f will be:

1
1
5
6
-5
-5

Try it yourself

Syntax

Math.ceil(x)

Parameter value

Parameter Description
x Required. The number you want to round up.

Technical details

Return value: A number, representing the nearest integer when rounding up.
JavaScript version: ECMAScript 1

Browserstøtte

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Relaterede sider

Tutorial:JavaScript matematik