Number

Summary

Creates a wrapper object to allow you to work with numerical values.

Syntax

new Number(value)

Parameters

value

The numeric value of the object being created.

Description

The primary uses for the Number object are:

If the argument cannot be converted into a number, it returns Nan.

In a non-constructor context (i.e., without the new operator), Number can be used to perform a type conversion.

Properties

For properties inherited by Number instances, see Properties of Number instances.

MAX_VALUE

The largest representable number.

MIN_VALUE

The smallest representable number.

NaN

Special "not a number" value.

NEGATIVE_INFINITY

Special value representing negative infinity; returned on overflow.

POSITIVE_INFINITY

Special value representing infinity; returned on overflow.

prototype

Allows the addition of properties to a Number object.

Methods

For methods inherited by Number instances, see Methods of Number instances.

Although the Number object contains no methods of its own, it does inherit some methods through the prototype chain.

Number instances

All Number instances inherit from Core_JavaScript_1.5_Reference:Global_Objects:Number:prototype

Examples

biggestNum = Number.MAX_VALUE;
smallestNum = Number.MIN_VALUE;
infiniteNum = Number.POSITIVE_INFINITY;
negInfiniteNum = Number.NEGATIVE_INFINITY;
notANum = Number.NaN;

var d = new Date("December 17, 1995 03:24:00");
print(Number(d));

See also

• NaN