check digit


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check digit

[′chek ‚dij·ət]
(computer science)
A redundant digit used to perform a check.

check digit

A numeric digit used to ensure that account numbers are entered accurately into the computer. Using a formula, a digit is calculated from each new account number, which is then made part of that number, either at the end, the beginning or somewhere in the middle of the number.

When an account number with the check digit is entered, the data entry program recalculates the check digit and compares it to the check digit entered. If the digits are not equal, the account number is considered invalid.
References in periodicals archive ?
Account validation at remitting institution due to IBAN's check digit mechanism will significantly reduce errors related to account numbers.
These newly developed technologies help solve this issue by enabling key data to be restored by collecting a range of check digit data, which confirms when tampering takes place, then using an optimized combination of error-correcting code technologies that correct communication and memory errors and conventional secret dispersion technologies.
IBAN meant this would not happen because every number would include a country code and a check digit.
The final digit of the universal product code is a check digit that can be computed from the other digits as follows:
The check digit is calculated using the formula described in the published ISO ISWC standard.
When the patron bar codes came in we quickly found out the scheme wouldn't work because the check digit was inviolate.
The worker will not be given an order quantity to pick until a match is reached between the working slot that a person is directed to and its check digit.
20 New Ticket Number(s): Enter the three-digit validating airline code, form and serial number, and check digit (eleventh number) of the new ticket being issued.
We had surprisingly few problems with typing errors, as indicated by the internal Check Digit Verification of CAS Registry Numbers (17).
However, most modern implementations of barcodes require complicated check digit calculations for error correction that cannot be performed by the fonts themselves.
When a pallet is put away in the correct location, the operator simply keys a check digit into the radio terminal and the warehouse system is instantly updated.
Using a common algorithm for a check digit eliminates about 95% of the keying data errors.