How to use Bitwise AND operator in Javascript
Description
The bitwise AND operator is represented by the ampersand character &
and works on two values.
Bitwise AND uses the rules in the following truth table to perform an AND operation between the two bits in the same position.
| BIT FROM FIRST NUMBER | BIT FROM SECOND NUMBER | RESULT |
|---|---|---|
| 1 | 1 | 1 |
| 1 | 0 | 0 |
| 0 | 1 | 0 |
| 0 | 0 | 0 |
The result will be 1 only if both bits are 1. If either bit is 0, then the result is 0.
Example
var result = 25 & 3;
console.log(result); //1
The actual calculation.
25 = 0000 0000 0000 0000 0000 0000 0001 1001
3 = 0000 0000 0000 0000 0000 0000 0000 0011
---------------------------------------------
AND = 0000 0000 0000 0000 0000 0000 0000 0001
The code above generates the following result.
