Bitwise complement operator

Question

Can anyone explain why ~4 equals to -5, and what's happening under the hood?

Shouldn't it be a positive integer if every bit is flipped?

Any answer is appreciated 👍

https://code.sololearn.com/cWToKRtCEoW1/?ref=app

Answer 1

Time is Money
And in which language that ~ work that way? do you have a resource to backup your statement to be shared here, for people to learn?

Answer 2

Time is Money,
Please note that Nick here had tagged C# as the language relevant to the question. The link you provided is in regard to Javascript.

Also, it is ccovering the use of ~~ (double tilde symbol) if you read it more carefully, and see the provided examples below the paragraph mentioning that statement.

Quoted from the link:
"However, the most practical way of utilizing the power of this operator is to use it as a replacement for Math.floor() function as *double bitwise NOT* performs the same operation a lot quicker."

Answer 3

Sorry for the wrong information
~ is the bitwise NOT operator
Bitwise NOT changes each bit to its opposite: 0 becomes 1, and 1 becomes 0.

In your case

3 --> 0000000000000011
Covert 0 to 1 and 1 to 0
1111111111111100
Which is equals to -4