Search Results for: Non-electrical articles
valid isbn – the sum of the digits multiplied by their weights will never be a multiple of . however, if the error were to occur in the publishing house and remain undetected, the book would be issued with an invalid isbn. [ ] in contrast, it is possible for other types of error, such as two altered non-transposed
-( ))\,{mod {\,}} \&=( )\,{mod {\,}} \&= \end{aligned}}} thus the check digit is . it is possible to avoid the multiplications in a software implementation by using two accumulators. repeatedly adding t into s computes the necessary multiples: // returns isbn error syndrome, zero for a valid isbn, non-zero...
https://en.wikipedia.org/wiki/International_Standard_Book_Number