Math.ceil()

The Math.ceil() static method always rounds up and returns the smaller integer greater than or equal to a given number.

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Syntax

js

Math.ceil(x)

Parameters

x

A number.

Return value

The smallest integer greater than or equal to x. It's the same value as -Math.floor(-x).

Description

Because ceil() is a static method of Math, you always use it as Math.ceil(), rather than as a method of a Math object you created (Math is not a constructor).

Examples

Using Math.ceil()

js

Math.ceil(-Infinity); // -Infinity
Math.ceil(-7.004); // -7
Math.ceil(-4); // -4
Math.ceil(-0.95); // -0
Math.ceil(-0); // -0
Math.ceil(0); // 0
Math.ceil(0.95); // 1
Math.ceil(4); // 4
Math.ceil(7.004); // 8
Math.ceil(Infinity); // Infinity

Specifications

Specification
ECMAScript Language Specification
# sec-math.ceil

Browser compatibility

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See also