Engineering Reference Tables / Computer Number Systems

It is used to represent numbers in the computer.They are 4 types of number systems used in the computer.

Number system Base Used digits Example
Binary 2 0,1 (11110000) 2
Octal 8 0,1,2,3,4,5,6,7 (360)8
Decimal 10 0,1,2,3,4,5,6,7,8,9 (240) 10
Hexadecimal 16 0,1,2,3,4,5,6,7,8,9, A,B,C,D,E,F (F0)16


Characters Used in Each Number system

Hexadecimal Decimal Octal Binary
0 0 0 0
1 1 1 1
2 2 2 10
3 3 3 11
4 4 4 100
5 5 5 101
6 6 6 110
7 7 7 111
8 8 10 1000
9 9 11 1001
A 10 12 1010
B 11 13 1011
C 12 14 1100
D 13 15 1101
E 14 16 1110
F 15 17 1111

Home     Back