Program to check for ISBN | 就是愛看書
![Program to check for ISBN](https://i.imgur.com/y8QtHep.jpg)
2022年7月22日—ToverifyanISBN,calculate10timesthefirstdigit,plus9timestheseconddigit,plus8timesthethirddigitandsoonuntilweadd1time ...
![Program to check for ISBN](https://i.imgur.com/y8QtHep.jpg)
Last Updated : 17 Feb, 2023
An ISBN (International Standard Book Number)[1] is a 10 digit number that is used to identify a book. The first nine digits of the ISBN number are used to represent the Title, Publisher and Group of the book and the last digit is used for checking whether ISBN is correct or not.
The first 9 digits of it, can take any value between 0 and 9, but the last digits, sometimes may take value equal to 10; this is done by writing it as ‘X’.
To verify an ISBN, calculate 10 times the first digit, plus 9 times the second digit, plus 8 times the third digit and so on until we add 1 time the last digit. If the final number leaves no remainder when divided by 11, the code is a valid ISBN.
Examples :
Input : 007462542X Output : Valid 007462542X...Check Digit Mod 11 (ISBN | 就是愛看書
ISBN | 就是愛看書
ISBN | 就是愛看書
ISBN check digit calculator | 就是愛看書
ISBN Check Digit For The 13 | 就是愛看書
Practice Check | 就是愛看書
Program to check for ISBN | 就是愛看書
![](https://i.imgur.com/y8QtHep.jpg)
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