### What is the number system?

- The number system can be defined as the language of a number.
- In digital electronics, the number system used for representing the information.

In digital electronics the number system are two types:

- Positional number system
- Non-Positional number system

**Positional number system**

A Positional number system known as “weighted number”. It is the number system in which each position has some weight.

The weighted number system is:

- Binary Number System.
- Decimal Number System.
- Octal Number System.
- Hexa Decimal Number System.

The Weighted number are classified based on **Radix **or **Base value.**

Let the number is ‘**x**‘ and the radix or base is ‘**r,’** then the number is represented as (x)r.

NOTE:Depending upon the value of “r,” we decide the type of number system of “x.”