JavaScript BigInt Reference

JavaScript BigInt is an inbuilt object in JavaScript that provides a way to represent whole numbers larger than 2⁵³-1 which is the largest number that can represent with the Number primitive. It is represented by the MAX_SAFE_INTEGER constant.

Example: This example creates a BigInt by appending n at the end of the number.

Javascript

// Decimal format
let bigNum = 123422222222222222222222222222222222222n
console.log(bigNum)

// Hexadecimal format
let bigHex = 0x1ffffffeeeeeeeeefn
console.log(bigHex)

// Binary format
let bigBin = 0b1010101001010101001111111111111111n
console.log(bigBin)

Output:

123422222222222222222222222222222222222n
VM41:6 36893488074118328047n
VM41:10 11430854655n

The complete methods of the JavaScript BigInt object are listed below:

JavaScript BigInt Constructor: A constructor gets called when an object is created using the new keyword.

Constructor	Descriptions	Example
BigInt()	Convert any primitive data type or object to a BigInt data type.	Try

JavaScript BigInt Properties: A JavaScript property is a member of an object that associates a key with a value.

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

Instance Properties	Descriptions	Example
constructor	Return the bigInt constructor function for the object.	Try

JavaScript BigInt Methods: Methods are actions that can be performed on objects.

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

Static Methods	Descriptions	Example
asIntN()	Wrap a BigInt value to a signed integer between -2width-1 and 2width-1-1.	Try
asUintN()	Wrap a BigInt value to an unsigned integer between 0 and 2width-1.	Try

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

Instance Methods	Descriptions	Example
toLocaleString()	Return a string with a language-sensitive representation of this BigInt.	Try
toString()	Return a string representing the specified BigInt object.	Try
valueOf()	Return the wrapped primitive value of a BigInt object.	Try