Advantages of BCD
- One advantage of BCD over binary representations is that there is no limit to the size of a number. To add another digit, just add a new 4-bit sequence.
- Numbers represented in pure binary format are limited to the largest number that can be represented by 8, 16, 32 or 64 bits.
- Sometimes, the right-most nibble contains the sign (positive or negative).
- It is easier to convert decimal numbers to and from BCD than binary and, though BCD is often converted to binary for arithmetic processing, it is possible to build hardware that operates directly on BCD.