Chapter 5 Exercise 36, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

**5.36 (Business application: checking ISBN ) Use loops to simplify Programming Exercise 3.9.

import java.util.Scanner;
 
 
public class ProgrammingEx5_36 {
 
 public static void main(String[] args) {
  Scanner input = new Scanner(System.in);
 
  System.out.print("Enter the first 9 digits of an ISBN as integer:");
  int d10 = 0;
  int isbn = input.nextInt();
 
  for (int i = 1; i <= 9; i++) {
 
   d10 += i*(isbn % ((int) (Math.pow(10, (10 - i))))
     / ((int) Math.pow(10, (9 - i))));
 
  }
   
  d10=d10%11;
 
  System.out.print("The ISBN-10 number is " + isbn);
 
  if (d10 == 10) {
   System.out.print('X');
  } else {
   System.out.print(d10);
  }
 
 }
 
}