👉 Computer Numbering System:-

The technique to represent and work with numbers is called number system. Decimal number system is the most common number
system. Other popular number systems include binary number


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system, octal number system, hexadecimal number system, etc.

Decimal Number System:-

Decimal number system is a base 10 number system having 10

digits from 0 to 9. This means that any numerical quantity can be

represented using these 10 digits. Decimal number system is also

a positional value system.

Binary Number System:-

The easiest way to vary instructions through electric signals is two-

state system – on and off. On is represented as 1 and off as 0, though 0

is not actually no signal but signal at a lower voltage. The number

system having just these two digits – 0 and 1 – is called binary number

system.

Octal Number System:-

Octal number system has eight digits – 0, 1, 2, 3, 4, 5, 6 and 7. Octal

number system is also a positional value system with where each digit

has its value expressed in powers of 8, as shown here −

Decimal equivalent of any octal number is sum of product of each digit with its  positional value.

7268 = 7×82+ 2×81 + 6×80 

= 448 + 16 + 6 

= 47010 

Hexadecimal Number System:- 

Octal number system has 16 symbols – 0 to 9 and A to F where A is  equal to 10, B is equal to 11 and so on till F. Hexadecimal number system is also a positional value system with where each digit has its  value expressed in powers of 16, as shown here −