BCD Code

Binary Coded Decimal Numbering System otherwise known as BCD Code is a process for converting decimal numbers into their binary equivalents. BCD code is more also known as 8421 BCD code.

The BCD equivalent of a decimal number is written by replacing each decimal digit in the integer and fractional parts with its four bit binary equivalent.

0	0000
1	0001
2	0010
3	0011
4	0100
5	0101
6	0110
7	0111
8	1000
9	1001

Electronics, true BCD code uses 0 to represent a switch that is ON and 1 for a switch that is off.