A check digit is a method of verifying the accuracy of a single data item, such as a credit card number.

检验位是一种校验单个数据项的准确性的方法，如信用卡号。

youdao

A check digit is a method of verifying the accuracy of a single data item, such as a credit card number.

检验位是一种校验单个数据项的准确性的方法，如信用卡号。

youdao