JavaScript BigInt Reference
Last Updated : 18 Apr, 2025
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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.
// 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 11430854655nThe 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 |
|---|---|
| BigInt() | Convert any primitive data type or object to a BigInt data type. |
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 |
|---|---|
| constructor | Return the bigInt constructor function for the object. |
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 |
|---|---|
| asIntN() | Wrap a BigInt value to a signed integer between -2width-1 and 2width-1-1. |
| asUintN() | Wrap a BigInt value to an unsigned integer between 0 and 2width-1. |
- Instance Method: If the method is called on an instance of a number then it is called an instance method.
| Instance Methods | Descriptions |
|---|---|
| toLocaleString() | Return a string with a language-sensitive representation of this BigInt. |
| toString() | Return a string representing the specified BigInt object. |
| valueOf() | Return the wrapped primitive value of a BigInt object. |
