what does the <<= operator do in javascript?

Question

I am working on a project for a javascript program as seen in the following...

var temp = 14;
var y 2;
temp <<= y;
document.write(temp)

....and I can't figure out how the <<= operator works of how this program works. Can someone please explain how it works? Thanks.

[It's the left-shift assignment operator.](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Assignment_operators) — Pointy, Apr 04 '16 at 13:55
[What are bitwise operators](http://stackoverflow.com/questions/276706/what-are-bitwise-operators) — adeneo, Apr 04 '16 at 13:58

score 2 · Answer 1 · answered Apr 04 '16 at 13:56

2

It is a bitwise left shift operator. For more details check here

a << b Shifts a in binary representation b (< 32) bits to the left, shifting in zeroes from the right.

answered Apr 04 '16 at 13:56

Akshay Khandelwal

and oh by adding`=` you are just assigning it to some variable while also the shift taking place in same line of code – Akshay Khandelwal Apr 04 '16 at 13:57

1 Answers1