We can categorize binary codes in following types:
Weighted codes: These codes have fixed weights for different binary positions
e.g. BCD codes, 8 4 -2 -1, 2 4 2 1 etc
Non-weighted codes: These codes don’t have fixed weights for different binary positions
e.g. excess-3 codes, gray code
Sequential codes: In this coding system, we have consecutive codeswhosedecimal equivalents differ only by 1
e.g. excess-3 codes
Random codes: These codes don’t have consecutive codes differing by 1 in their decimal equivalents
e.g. gray codes
Alphanumeric codes: These codes are used to represent different alphabets. We can have codes for 26 alphabets both in lowercase and higher case, numeric 0-9 and some special symbols like @,#,$,%,& etc . ASCII codes are an example of alphanumeric codes
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