Javascript operators << and >>

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What do these operators do?
What is this expression in Java ( 1 << 2)?

What does >> and << operators in JavaScript do?

I've never seen them before and im breaking my head trying to understand them.

Any help is appreciated :D

https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Bitwise_Operators?redirectlocale=en-US&redirectslug=Core_JavaScript_1.5_Reference%2FOperators%2FBitwise_Operators — PeeHaa, Sep 07 '12 at 23:16
trying to find the javascript question that this is a dupe of, if only it wasn't so hard to search for on [SO] — zzzzBov, Sep 07 '12 at 23:18
To address this sort of question about a language, please consult a reference. The keyword is, of course, **operators**. -1 because you knew *what* look for. — , Sep 07 '12 at 23:19
Don't forget `>>>`, `-->`, `-->>`, `-->>>`, `<--` and `<<--`. — some, Sep 07 '12 at 23:30

score 0 · Answer 1 · answered Sep 07 '12 at 23:16

0

They are bit shifting operators.

answered Sep 07 '12 at 23:16

Robert Harvey

score 0 · Answer 2 · answered Sep 07 '12 at 23:18

0

They are bitwise shift operators.

In practice they are used to shift bits of variables by the specified amount, eg

2 << 2 = 8

answered Sep 07 '12 at 23:18

Jack

score 0 · Answer 3 · answered Sep 07 '12 at 23:19

0

They are standard bitwise shift operators. You need to draw 1 and 0s on paper to understand it better:

answered Sep 07 '12 at 23:19

Andrei Drynov

3 Answers3