check digit

基本解釋

A binary check digit; for example , a parity bit.
一個二進位校驗位元，例如奇偶位。
The card number, a thirteen- or sixteen-digit string with a check digit
信用卡號，13 或 16 位數(shù)字組成的字符串，包括一個校驗位
I'm trying to make a program that check the ISBN number and sees if it has the correct check digit, if it doesn't have the check digit it will add one.
我試圖制作一個程序，檢查ISBN號碼，看看它是否有正確的校驗位，如果沒有校驗位，它將添加一個。

Glancing at the bottom, this is pretty arbitrary, but I chose to format my string as follows: % 1f so at the bottom here I'm printing out %.1f, which quick sanity check means print just one digit after the decimal place.
看下這個底部，這個是相當隨意的，但我選擇把我的字符串格式化成這樣：,所以在這個底部我打印輸出，提醒一下，這是一個只打印出,小數(shù)點后一位的方法。
哈佛公開課 - 計算機科學課程節(jié)選

The random 18-digit code plus two check digits will have a four-digit prefix added and it will have intelligence in it.
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All that the user needs to do is swipe the card at the existing check-out machine and enter a four digit PIN.
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The lower that two digit number is - like say 05 - the sooner your check gets cut.
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a digit derived from and appended to a string of data digits, used to detect corruption of the data string during transmission or transcription