Number Systems

There are different types of number systems.
Normally we are using Decimal number system. ie, with base 10.
We all know that computer can understand only 0's and 1's. This number system is known as Binary number system. ie, base 2.

The main four number systems are given below,

1. Decimal: Base-10
                    Numbers are 0,1,2,3,4,5,6,7,8,9
                   
                    e.g. (935)10, (541)10, (12378)10 etc


2. Binary: Base- 2
                 Numbers are 0, 1

                 e.g.  (110)2, (1111)2, etc


3. Octal:  Base- 8
                Numbers are  0,1,2,3,4,5,6,7

                e.g. (745)8, (136)8


4. Hexadecimal:  Base- 16

Numbers used are:

Decimal                Hexadecimal

0                                 0
1                                 1
2                                 2
3                                 3
4                                 4
5                                 5
6                                 6
7                                 7
8                                 8
9                                 9
10                              A
11                              B
12                              C
13                              D
14                              E
15                              F

      e.g   (1A65)16, (ABCD)16 etc.