What does ~0 do?

Question

---

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

~0 == 0xFFFFFFFF

where 0xFFFFFFFF= 32 times 1 , which is -1 in 2's compliement representation

since ~ is a bitwise operation and turns zero to one in each bit:

~0b1010 == 0b0101