Answer:
Check the explanation
Explanation:
public class Exercise_06_01 {
/** Main Method */
public static void main(String[] args) {
final int NUMBER_OF_PENTAGONALS = 100; // Display the first 100 pentagonals
final int NUMBER_PER_LINE = 10; // Display 10 number per line
// Display the first 100 pentagol numbers
System.out.println("The first 100 pentagonal numbers, ten per line: ");
for (int i = 1; i <= NUMBER_OF_PENTAGONALS; i++) {
// Print ten numbers per line
if (i % NUMBER_PER_LINE == 0)
System.out.printf("%7d\n", getPentagonalNumber(i));
else
System.out.printf("%7d", getPentagonalNumber(i));
}
}
/** Return a pentagonal number */
public static int getPentagonalNumber(int n) {
return (n * (3 * n - 1)) / 2;
}
}
