**Binary System**. It is also known as

**B**

**ase-2 number system**

**The Binary system**works in essentially the same way, with the only difference being that it only has two digits. these are visually expressed by the digits 0 and 1, and every number expressed in the binary system is the combination of 0 and 1.

The Binary system is essential in modern electronic technology, because any electronic circuit can have only two possible states, on or off. Here in computer language 0 is for on and 1 is for off. This is true of computers too. So, all the information in a computer is stored and transmitted as sequence of binary Digits i.e 0 and 1.

Computers can't understand our language and can only understand only its language. A computer's language is made up of a combination of 0s and 1s only as it can only understand these two digit's.

As computer can understand only 0s and 1s, so a special coding technique had to be formed so that the numbers, letters and other characters could be converted into a computer understandable format. This coded from of number, letters, words etc is called

*"The Binary Number Concept"*.

**Binary Number System**

In the binary number system of representation, the base is 2 and only numerals 0 and 1 are required to represent a number. The numerals 0 and 1 have the same meaning as in the decimal system, but a different interpretation is placed on the position occupied by a digit. In the binary system the individual digit represent the coefficients of Powers of 2 rather than 10 as in the decimal system.

For example, the decimal number 19 is written in the binary representations as 10011.

10011= 1×2^{4 }+ 0×2^{3 }+ 0×2^{2 }+ 1×2^{1 }+ 1×2^{0}

= 16 + 0 + 0 + 2 + 1

= 19

Binary digit is often referred to by the common abbreviations as bit. Thus, a bit in computer terminology means either a 0 or 1.