JavaScript - The Number Object

The Number object represents numerical date, either integers or floating-point numbers. In general, you do not need to worry about Number objects because the browser automatically converts number literals to instances of the number class.


The syntax for creating a number object is as follows −

var val = new Number(number);

In the place of number, if you provide any non-number argument, then the argument cannot be converted into a number, it returns NaN (Not-a-Number).

Number Properties

Here is a list of each property and their description.

Sr.No. Property & Description

The largest possible value a number in JavaScript can have 1.7976931348623157E+308


The smallest possible value a number in JavaScript can have 5E-324

3 NaN

Equal to a value that is not a number.


A value that is less than MIN_VALUE.


A value that is greater than MAX_VALUE

6 prototype

A static property of the Number object. Use the prototype property to assign new properties and methods to the Number object in the current document

7 constructor

Returns the function that created this object's instance. By default this is the Number object.

In the following sections, we will take a few examples to demonstrate the properties of Number.

Number Methods

The Number object contains only the default methods that are a part of every object's definition.

Sr.No. Method & Description
1 toExponential()

Forces a number to display in exponential notation, even if the number is in the range in which JavaScript normally uses standard notation.

2 toFixed()

Formats a number with a specific number of digits to the right of the decimal.

3 toLocaleString()

Returns a string value version of the current number in a format that may vary according to a browser's local settings.

4 toPrecision()

Defines how many total digits (including digits to the left and right of the decimal) to display of a number.

5 toString()

Returns the string representation of the number's value.

6 valueOf()

Returns the number's value.

In the following sections, we will have a few examples to explain the methods of Number.

Kickstart Your Career

Get certified by completing the course

Get Started