Questions tagged [bitwise-operators]

low-level, primitive operations that directly manipulate bit patterns and binary numerals

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19
votes
15answers
4k views

What are bit operators good for? [closed]

Programming languages often come with various bit operators (e.g. bitwise left- and right shift, bitwise AND, OR, XOR...). These don't get used though very much, or at least such has my experience ...
6
votes
3answers
5k views

How does bit flipping / complementing work?

I am currently learning about bitwise operation, so bear with me. I understand AND, OR, and shifting. What I don't understand is bit flipping. So, 5 is 0101. When someone says to me "flip those", it ...
63
votes
2answers
6k views

Why do bitwise operators have lower priority than comparisons?

Could someone explain the rationale, why in a bunch of most popular languages (see note below) comparison operators (==, !=, <, >, <=, >=) have higher priority than bitwise operators (&, |, ^...
32
votes
1answer
3k views

Why was the caret used for XOR instead of exponentiation?

Not that it's really a problem for anyone that has faced this syntactic issue before, but I see a wild amount of confusion stemming from the use of the caret (^) as the XOR operation in lieu of the ...
12
votes
3answers
69k views

How are negative signed values stored?

I was watching this video on the maximum and minimum values of signed integers. Take an example of a positive signed value - 0000 0001 The first bit denotes that the number is positive and the last ...