It is that type of binary code where weights are assigned to each symbol position in the code word.
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what is weighted codes: The decimal value of a code is obtained summing up the positional values. weghted binary code s are those which obey positional weighting principle. each position of number represents a specific weight. There are millions of weighted code The most common one is 8421 Non weighted codes: This codes are not positionaly weghted. each position with in the binary no is not assgned to afixed value.Examples of nonweghted code is ASCCI, GREY CODE, EBCDIC CODE etc
0000,0001,0010,0011,0100,0101,0110,0111,1011,1100,1101,1110
There is no real answer to this. Binary codes can be any length. The minimum length is 1 byte.
BCD codes,gray code,error detecting code,ASCII character code,Excess 3 code
a modified binary code in which sequential binary numbers are represented by expressions that differ only in one bit, to minimize errors.