BCD Adder

A BCD (Binary-Coded Decimal) adder is a digital device used to add numbers expressed in decimal form, where each digit is represented in binary. Since binary addition can produce results outside the valid range for a single decimal digit (0-9), the BCD adder includes mechanisms to correct these results. When a sum exceeds 9, the device adjusts it by adding 6 (0110 in binary) to produce an accurate decimal sum. This process ensures that each digit remains properly represented in BCD format, making it ideal for digital systems like calculators and digital displays that work with human-readable decimal numbers.