LXer: The curious world of check digits
by LXer from LinuxQuestions.org on (#5K60Z)
Published at LXer:
In many standardised numerical codes, one or more digits are special. They're called check digits and they can be used to check that the code hasn't changed due to human or computer error. This post shows how they work and includes an AWK function for checking one kind of numerical code.
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In many standardised numerical codes, one or more digits are special. They're called check digits and they can be used to check that the code hasn't changed due to human or computer error. This post shows how they work and includes an AWK function for checking one kind of numerical code.
Read More...