Lesson 14 +15 XP

Bitwise and BigInt

Bitwise and BigInt

Two special areas of numbers: bitwise operators work on the binary bits of numbers, and BigInt handles numbers too big for regular Number.

Bitwise operators

Bitwise operators act on the 32-bit binary representation of numbers:

Operator	Name	Example
`&`	AND	`5 & 1` = 1
`	`	OR	`5	1` = 5
`~`	NOT	`~5` = -6
`^`	XOR	`5 ^ 1` = 4
`<<`	left shift	`5 << 1` = 10
`>>`	right shift	`5 >> 1` = 2

Example: 5 is binary 101. 5 & 1 (101 & 001) = 001 = 1.

BigInt

BigInt lets you work with integers larger than the normal Number limit:

let big = 9007199254740991n;
let huge = 123456789012345678901234567890n;

Creating BigInt

Add an n to the end of an integer.
Or use the BigInt() function: BigInt(10).

BigInt rules

You cannot mix BigInt and regular Number in math without conversion.
BigInt only works with whole numbers, no decimals.

TL;DR

Bitwise operators work on binary bits: & | ~ ^ << >>.
BigInt handles huge integers using an n suffix.
BigInt cannot mix freely with regular numbers.