Check Digit (IGCS)

Check Digit (IGCS)

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What is the ISBN number in your textbook? Check backcover in your textbook and give your answer in the following format:

XXX-X-XXXX-XXXX-X

Read the following article about ISBN

https://www.isbn-international.org/content/what-isbn

Multiple Select

How many digits are there in ISBN?

• 10

• 11

• 12

• 13

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ISBN stands for:

Multiple Choice

Is ISBN an unique code?

• No

• Yes, it is unique for every copy of the book

• Yes it is unique for every book title

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How do we call the last digit in ISBN?

So what is check digit?

• A digit that is calculated from all the other digits in the code

• Usually the last digit in a code

• Checks the data entry caused by mis-typing or mis-scanning (barcode)

• Check digits are usually find in barcodes, ISBN, credit card and ID card numbers