2421 Codes || Self complementing codes || Weighted codes || Reciprocating codes || BCD codes ||
In 2421 code, the weights assigned to the four digits are 2, 4,
2, and 1. The 2421 code is the same as that in BCD from 0 to 4; however, it varies from 5 to 9. For example, in this case the bit combination 0100 represents decimal 4; whereas
the bit combination 1101 is interpreted as the decimal 7, as obtained from 2 × 1 + 1 × 4
0 × 2 + 1 × 1 = 7. This is also a self-complementary code, that is, the 9’s complement of
the decimal number is obtained by changing the 1s to 0s and 0s to 1s.
Number System and Codes: • Number System and Codes
Weighted codes: • Weighted codes || Classification of b...