What does ~0 do?

Question

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Does ~0 mean its flipping 000000000 to 1111111111?

printf(\"Check: %i\", ~0);

The printf results to -1, which is why I am confused. <

Answer 1

It is due to the mathematical operation "two's complement". A nice video tutorial of two's complement can be found on youtube. Here's one of them :)

youtube link