Loops - execise no 07 slide no 69

package class170629;

import java.util.Scanner;

public class LoopsEx07Slide69 {

    public static void main(String[] args) {
        // carpet
        // input: integer number - the size of the carpet
        // output: draw a carpet in the selected size

        // create a scanner
        Scanner s = new Scanner(System.in);
        // ask for and get the carpet size
        System.out.print("Enter the carpet size: ");
        int n = s.nextInt(); // input: the carpet size from the user

        // in each row or column there is : n*n astricks + (n-1) spaces
        int size = n * n + n - 1; // calculated:number of rows and columns

        // for each row
        for (int row = 0; row < size; row += 1) {
            // if it is a blank row
            if (row % (n + 1) == n) {
                // just go to a new row
                System.out.println();
            } else {
                // its not a blank row, so for each column
                for (int col = 0; col < size; col += 1) {
                    // print one char:
                    // space after each block
                    // or astrick
                    System.out.print(col % (n + 1) == n ? " " : "*");
                }
                // start a new row
                System.out.println();
            }

        }
        // close the scanner
        s.close();

    }

}