What Does X Y Represent In Javascript

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What does 'x << ~y' represent in JavaScript?

Tags: javascript , bitwise-operators Answers: 1 | Viewed 3,562 times



What does 'x << ~y' represent in JavaScript?


I understand that the bitwise SHIFT operation does this:


x << y AS x * 2y

And a tilde ~ operator does:


~x AS -(x+1)

So, I assume the following:


5 << ~3 AS 5 * 2-4 or 5 * Math.pow(2, -4)

It should result in 0.3125.


But, when I run 5 << ~3 it results in 1342177280.


What is a step-by-step explanation? How and why does this combination of operations result in 1342177280 instead of 0.3125?


(This question is similar to Stack Overflow question What are bitwise operators? about the bitwise SHIFT operator.)


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