check digit

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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.

check digit [′chek ‚dij·ət]

(computer science)

A redundant digit used to perform a check.

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bar code
check bit
checksum
data entry program

redundancy check
self-checking digit
systematic error-checking code
validate

We had surprisingly few problems with typing errors, as indicated by the internal Check Digit Verification of CAS Registry Numbers (17).

Data Quality in Predictive Toxicology: Identification of Chemical ... by Gottmann, Eva / Environmental Health Perspectives

However, most modern implementations of barcodes require complicated check digit calculations for error correction that cannot be performed by the fonts themselves.

IDAUTOMATION.COM, INC. RELEASES MS OFFICE MACROS AND VISUAL BASIC ... by EDP Weekly's IT Monitor

Of the three drives, two hold actual data, while a third contains check digits.

Averting disaster with redundant hardware by Brown, Steven D. / The Tax Adviser

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