binary num sys..

Binary number sysem number to the base two usd in computing and eloctronics.All binary numbers are written using a combination of the digits 0and 1.
1,000s 100s 10s 1s
(10)3 (10)2 (10)1 (10)
2 5 6 7
binary ,or base-two numbers may be considerd to be written under coloumn headings based on the number two For example the binary number 1101 stands for.
The binary number 1101 is therefore equivalant to the decimal number 13,since(1x8)+(1x4)+1(1x1)=13