# What is binary number

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A binary number is represened by 0 and 1. The binary number system has base 2. It is used in digital electronics. For example 7 can be represented in binary system as 111. That is $7=1\times2^2+1\times2^1+1\times2^0$

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A binary number uses only two digits zero and one. In a binary system, numbers are represented as follows

 NUMBER AS INTEGER NUMBER IN BINARY 0 00 1 01 2 10 3 11 4 100 5 101 6 110 7 111

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