JavaScript NOT(~) Operator is used to invert the bits of a number. The operator is represented by “~” symbol. It is a unary operator since it requires only one operand to operate. There are various uses of the Bitwise NOT operator which include bit-masking, finding two’s complement as well as error correction.
Let’s look at the truth table below to better understand the output of the NOR operation.
| A | OUTPUT ( ~A ) |
|---|---|
| 0 | 1 |
| 1 | 0 |
Syntax:
a ~ b
Example 1: In this example, we will perform basic NOT operation on Numbers.
Javascript
console.log(~24); console.log(~10); console.log(~-10); |
Output:
-25 -11 9
Example 2: In this example, we will use the Bitwise NOT operator to find Two’s Complement of a number.
Javascript
function twoComplement(n) { let j = ~(n.toString(2)) + 1; return j; } console.log(twoComplement(2)); console.log(twoComplement(-2)); |
Output: To find the two’s complement we first convert the decimal number to binary then invert the bits using NOT Operator and add 1 afterward.
-10 10
Supported Browsers:
- Chrome
- Edge
- Firefox
- Opera
- Safari
We have a complete list of JavaScript Bitwise Operators, to check those please go through, the JavaScript Bitwise Operators article
