Pyramid pattern in Java

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How to print pyramid pattern in Java

Java code to create star pyramid pattern using nested loops. This is a common programming problem for beginners. The program asks the user to enter the number of rows of the pyramid.

Pyramid pattern:

    *
   ***
  *****
 *******
*********

import java.util.Scanner;

public class StarPyramidPattern {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int rows, i, j, k, n;
        
        do {
            System.out.print("Number of rows (>1): ");
            rows = sc.nextInt();
        } while (rows <= 1);
        
        n = 1; // number of '*' per row -> row 1 -> 1 *
        for (i = 1; i <= rows; i++) {  //outer loop -> number of rows
            for (j = 1; j <= rows - i; j++) {  // inner loop -> prints leading spaces for each row                
                System.out.print(" ");
            }
            for (k = 1; k <= n; k++) { // inner loop -> prints n * for each row
                System.out.print("*");
            }
            n += 2; // The next row has 2 '*' more than the previous row                                          
            System.out.println();
        }
    }
    
}//pyramid pattern