COMPUTER HARDWARE BASICS: NUMBER SYSTEMS

DECIMAL NUMBER SYSTEM

• Decimal number has a base of 10
• It uses ten numerals, which are 0,1,2,3,4,5,6,7,8 and 9.

BINARY NUMBER SYSTEM

• Binary number has a base of 2.
• It uses two numerals, which are 0 and 1.
• This is the number system used by computers.

OCTAL NUMBER SYSTEMS

• Octal number has a base of 8.
• It uses eight numerals, which are 0,1,2,3,4,5,6 and 7.

HEXADECIMAL NUMBER SYSTEM

• Hexadecimal number has a base of sixteen.
• It uses sixteen symbols, which are 0,1,2,3,4,5,6,7,8,9,A,B,C,D and E.
• This is the number system typically used to represent digital data.