Why is -(-2147483648) = - 2147483648 in a 32-bit machine?

Why is -(-2147483648) = - 2147483648 in a 32-bit machine?

c 32-bit twos-complement

c

Find most significant bit (left-most) that is set in a bit array

c bit-manipulation 32-bit

c

Size of pid_t, uid_t, gid_t on Linux

c linux 64-bit 32-bit sizeof

c

On 32-bit machines, atan2 is nondeterministic when I don't store its result in a variable. Why? [duplicate]

c++ c floating-point 32-bit ieee-754

c