JavaScript Number Reference

Last Updated : 23 Jul, 2025

JavaScript Numbers are always stored in double-precision 64-bit binary format IEEE 754. The types of number literals You can use decimal, binary, octal, and hexadecimal.

Syntax:

Number(object)

JavaScript

function func() {  
    // Original string
    let a = true;
    
    let value = Number(a);
    console.log(value);
}
func();

Output

The complete list of JavaScript Numbers is listed below:

JavaScript Number Constructor: In JavaScript, a constructor gets called when an object is created using the new keyword.

Constructor	Description	Example
Number()	Returns the number format for any type of javascript variable.	Try

JavaScript Number Properties: A JavaScript property is a member of an object that associates a key with a value. There are two types of Number properties in JavaScript.

Static Property: A static property is a property that has the same value for the entire class.

Static Properties	Description	Example
EPSILON	Shows the difference between 1 and the smallest floating point number which is greater than 1.	Try
MAX_SAFE_INTEGER	Represents the maximum safe integer.	Try
MAX_VALUE	Represent maximum numeric values.	Try
MIN_SAFE_INTEGER	Represents the minimum safe integer.	Try
MIN_VALUE	Represent minimum numeric values.	Try
NaN	Represents a value that is not a valid number.	Try
NEGATIVE_INFINITY	Represents the largest negative value i.e negative infinity.	Try
POSITIVE_INFINITY	Represents the largest positive value i.e positive infinity.	Try

Instance Property: An instance property is a property that has a new copy for every new instance of the class.

Instance Properties	Description	Example
constructor	Return the number constructor function for the object.	Try

JavaScript Number Methods: JavaScript methods are the actions that can be performed on objects. There are types of Number methods in JavaScript.

Static Method: If the method is called using the Number class itself then it is called a static method.

Static Methods	Description	Example
isNaN()	Determine whether the passed value is NaN(Not a Number) and is of the type “Number”.	Try
isFinite()	Check whether the passed value is a finite number or not.	Try
isInteger()	Returns true if the passed value is an integer, otherwise false.	Try
isSafeInteger()	Check the provided value is a number that is a safe integer.	Try
parseFloat()	Accept the string and convert it into a floating-point number.	Try
parseInt()	Manipulate numbers whether it is negative or positive.	Try

Instance Method: If the method is called on an instance of a number then it is called an instance method.

Instance Methods	Description	Example
toExponential()	Returns a string representing the Number object in exponential notation.	Try
toFixed()	Format a number using fixed-point notation.	Try
toLocaleString()	Converts a number into a string, using a local language format.	Try
toPrecision()	Format a number to a specific precision or length.	Try
toString()	Return a string representing the specified Number object.	Try
valueOf()	Return the primitive value of a number.	Try