# Check Digit

A check digit is a form of redundancy check used for error detection, the decimal equivalent of a binary checksum. It consists of a single digit computed from the other digits in the message.

With a check digit, one can detect simple errors in the input of a series of digits, such as a single mistyped digit or some permutations of two successive digits.

### Other articles related to "check digit, digit, check, digits":

MSI Barcode - Example
... sequence 1234567 using the most common Mod 10 check digit methodology ... The check digit (as calcuated above) for this sequence is 4 ... Once you have calculated your check digit, simply map each character in the string to be encoded using the table above as a reference to get the binary map of ...
Codabar - Check Digit
... Because Codabar is self-checking, most standards do not define a check digit ... Some standards that use Codabar will define a check digit, but the algorithm is not universal ...
New Zealand DX Class Locomotive - In Service - Numbering
... The DX class received four-digit numbers starting with 5, in which the fourth number is a check digit for the number ... numbered in order, with DX 2600 renumbered DX 5016 (6 being the check digit) and DX 2648 renumbered DX 5517 ... these as these numbers do not generate a valid check digit, and DX 2639 never received a TMS number as it had been withdrawn by then ...
Routing Transit Number - Routing Number Format
... The ABA transit number appears in two forms on a standard check – the fraction form and the MICR (magnetic ink character recognition) form ... ink, and is machine-readable it appears at the bottom left of a check, and consists of nine digits ... of the MICR line, and still serves as a backup in check processing should the MICR line become illegible or torn it generally appears in the upper right part of a check near the date ...
MSI Barcode - Check Digit Calculation - Mod 10 Check Digit
... When using the Mod 10 check digit algorithm, a string to be encoded 1234567 will be printed with a check digit of 12345674 ... The Mod 10 check digit algorithm uses the Luhn algorithm ...

### Famous quotes containing the words digit and/or check:

Bless my soul, Sir, will you Britons not credit that an American can be a gentleman, & have read the Waverly Novels, tho every digit may have been in the tar-bucket?
Herman Melville (1819–1891)

Is there no hope for me? Is there no way
That I may sight and check that speeding bark
Which out of sight and sound is passing, passing?
Paul Laurence Dunbar (1872–1906)