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→Weaknesses: reworded, corrected |
→Strengths: Prepending leading zeros does not affect the check digit (a weakness for variable-length codes) |
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The Damm algorithm does not suffer from exceeding the number of 10 possible values, resulting in the need for using a non-digit character (as the [[X]] in the [[ISBN#ISBN-10 check digit calculation|10-digit ISBN]] [[Check digit#ISBN_10|check digit]] scheme).
Prepending leading zeros does not affect the check digit (a weakness for variable-length codes).<ref name="fenwick2014" />
There are totally anti-symmetric quasigroups that detect all phonetic errors associated with the English language (13 ↔ 30, 14 ↔ 40, ..., 19 ↔ 90). The table used in the illustrating example is based on an instance of such kind.
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===Weaknesses===
For all checksum algorithms including the Damm algorithm, prepending leading zeroes does not affect the check digit,<ref name="fenwick2014" /> so 1, 01, 001, etc. produce the same check digit. Consequently variable
== Design ==
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