Two's Complement

Two's Complement

8 bit

bit	signed	unsigned
1111 1111	-1	255
1111 1110	-2	254
1111 1101	-3	253
1111 1100	-4	252
1111 1011	-1	251
1111 1010	-1	250
1111 1001	-1	249
1111 1000	-1	248

32 bit

Unsigned: $0$ to $2^{32}$.

Signed: $-(2^{31})$ to $2^{31}-1$.

Memory

data	byte	bit
byte	1	4
short	2	8
int	4	32
long	8	16