ABSTRACT
BCD uses four digits to represent each numerical character. Thus, decimal 11 is represented by 0001 0001 (or just 10001, omitting the three leading zeros). Gray code is an important code because only one digit changes at a time.This property assists with error correction. Notice also how the least significant three bits of each Gray-coded number become reflected after a decimal count of seven. Because of this, Gray code is often referred to as a reflected code.
