The bitwise OR operator is | and works on two numbers.
Bitwise OR follows the following truth table:
| Bit From First Number | Bit From Second Number | Result |
|---|---|---|
| 1 | 1 | 1 |
| 1 | 0 | 1 |
| 0 | 1 | 1 |
| 0 | 0 | 0 |
A bitwise OR operation returns 1 if at least one bit is 1. It returns 0 only if both bits are 0.
The code below uses OR on the numbers 25 and 3:
var result = 25 | 3; console.log(result); //27
Here is how it worked.
25 = 0000 0000 0000 0000 0000 0000 0001 1001 3 = 0000 0000 0000 0000 0000 0000 0000 0011 --------------------------------------------- OR = 0000 0000 0000 0000 0000 0000 0001 1011