Represent a decimal number by coding each decimal digit separately as four bits of weights . The codes 10–15 are unused for one digit; a Boolean circuit must specify whether these combinations produce a defined result or are don't-care conditions.
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Binary-Coded Decimal (BCD) is a binary encoding scheme used to represent decimal numbers in a format that is easy to read for both humans and computers. In BCD, each digit of a decimal number is represented by its own binary sequence. For example, the decimal number 43 would be encoded in BCD as follows: - The digit '4' is represented as 0100 in binary. - The digit '3' is represented as 0011 in binary.