What is Advantage of excess 3 code?

Excess-3 code is a type of binary-coded decimal (BCD) that adds 3 to each decimal digit before encoding it in binary. This method simplifies decimal arithmetic operations, such as addition and subtraction, by avoiding the need for carry adjustments that are common in traditional BCD. Additionally, Excess-3 code ensures that all encoded values are positive, making it easier to detect errors and implement digital circuits for decimal numbers. This property enhances reliability in applications like calculators and digital displays.