Unsigned numbers
Only represent positive values (0 and above)
No negative numbers
Example (4-bit): 0000 = 0, 1111 = 15
Signed numbers
Represent both positive and negative values
Use sign bit (MSB)
Mostly use Two’s Complement method
Two’s Complement (important)
To get negative number:
Invert bits + add 1
Example:
5 → 0101
-5 → 1011
