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.

Read more about Check Digit:  Design

Famous quotes containing the words check and/or digit:

    If he had been sent to check out Bluebeard’s castle, he would have come back with a glowing report about the admirable condition of the cutlery.
    Mary McGrory (b. 1918)

    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)