It is a unary operator and operates by reversing all the bits in the operand.
Example
You can try to run the following code to learn how to work with Bitwise NOT Operator(~) −
<html>
<body>
<script>
var b = 3; // Bit presentation 11
document.write("(~b) => ");
result = (~b);
document.write(result);
</script>
</body>
</html>