Introduction to Computer Number Systems

Computer can understand only numbers. When we type letters or words computer translates it in to numbers. This technique is used to represent numbers in the computer system architecture. Only Binary,Octal,Decimal and hexadecimal number systems supports in computer architecture.


Specially in your Advanced level syllabus you should have clear idea about what is a number system and how to convert one number system to another.

Binary Number System
Binary number system has only two digits, 0 and 1.So base of binary number system is 2. Every value represents with 1 and 0.Each position in a binary number represent a 0 power of the base(2).
Binary calculations
a.Binary to octal
b.Binary to decimal
c.Binary to hexadecimal


Octal Number System
Octal number system has only eight digits(8) from 0 to 7. So base of octal number system is eight. Every value represents with 0,1,2,3,4,5,6 and 7 in this number system.
each positon in an octal number represents a 0 power of the base(8).
Octal calculations
a.Octal to binary
b.Octal to decimal
c.Octal to hexadecimal


Decimal Number System
Decimal calculations
a.Decimal to binary
b.Decimal to octal
c.Decimal to hexadecimal

Hexadecimal number system
Hexadecimal calculations
a.Hexadecimal to binary
b.Hexadecimal to octal
c.Hexadecimal to decimal

You can have a clear knowledge on Number System conversion by watching this video clip.
Number Systems Conversion

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