The Number object is an object wrapper fo primitive numeric values, allowing for their manipulation. To create a Number object use the Number constructor above. The following example creates a Number object of the numeric value 5:

Code:
five = new Number(5)

The main reason for doing this is to be able to use the constant properties fo the Number object, although you can create one in order to add properties to it. You can also convert any object to a number by using the Number function.

PROPERTIES

constructor property
This property specifies the function that created the object's prototype. See also the Object.constructor property.

Syntax: object.constructor

MAX_VALUE property
This property represents the largest value possible in JavaScript. It is a static property and hence always referred to as Number.MAX_VALUE, and has a value of approximately 1.79769e+308. Numbers larger than this are represented as infinity.

Syntax: Number.MAX_VALUE

MIN_VALUE property This property represents the smallest positive number possible in JavaScript, and as a static property is always referred to as Number.MIN_VALUE. Its value is 5e-324, and any value smaller than that is converted to 0.

Syntax: Number.MIN_VALUE

NaN property
This read-only property represents the special value Not-a-Number, and is always unequal to any other number (including 0) and to NaN itself. As a static property, it is always referred to as Number.NaN.

Syntax: Number.NaN

NEGATIVE_INFINITY property
This static, read-only property is a special value representing negative infinity, which is returned on overflow.

Syntax: Number.NEGATIVE_INFINITY

POSITIVE_INFINITY property
This static, read-only property is a special value representing infinity, which is returned on overflow.

Syntax: Number.POSITIVE_INFINITY

prototype property
This property represents the prototype for this object and allows you to add methods and properties of your own. See also the Function.prototype property.

Syntax: object.prototype

METHODS

toSource method
This method, which is usually called by JavaScript behind the scenes, returns a string representing the source code of the Number object. This method overrides the Object.toSource method.

Syntax: object.toSource()

toString method
This method returns a string representing the Number object, and is called by JavaScript whenever the code requires a string value. The optional 'radix' parameter is an integer between 2 and 36 which specifies the base to be used when representing numeric values. This method overrides the Object.toString method.

Syntax: object.toString([radix])

valueOf method
This method, which is usually called by Javascript behind the scenes, returns the primitive value of a Number object as a number data type. This method overrides the Object.valueOf method.

Syntax: object.valueOf()

NOTE:

The Number object also inherits the watch and unwatch methods from the Object object.