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;
}
}
The pentagonal number is an illustration of loops and conditional statements.
Loops are used to perform repetitive operations, while conditional statements are statements whose execution is dependent on its truth value.
The program in Java where comments are used to explain each line is as follows:
import java.util.*;
public class Main {
public static void main(String[] args) {
//This creates a Scanner object
Scanner input = new Scanner(System.in);
//This gets input for the count of pentagonal number to print
int num = input.nextInt();
//This iterates through num
for (int i = 1; i <= num; i++) {
//This prints on a new line after printing 10 numbers
if (i % 10 == 0){
System.out.println(getPentagonalNumber(i));
}
else{
System.out.print(getPentagonalNumber(i)+"\t");
}
}
}
//This defines the getPentagonalNumber function
public static int getPentagonalNumber(int n) {
//This returns the current pentagonal number
return (n * (3 * n - 1)) / 2;
}
}
Read more about loops and conditional statements at:
https://brainly.com/question/19344465
