Example: Star Pyramid Pattern in Java

// Star Pyramid Pattern
import java.util.Scanner;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        // Step 1: Declare a Scanner object to read user input
        Scanner scanner = new Scanner(System.in);

        // Step 2: Prompt the user to enter the number of rows
        System.out.print("Enter the number of rows for the pyramid: ");
        int numRows = scanner.nextInt();

        // Step 3: Outer loop for the number of rows
        for (int i = 0; i < numRows; i++) {
            // Step 4: Inner loop for printing leading spaces
            // The number of spaces decreases with each row
            for (int j = 0; j < numRows - i - 1; j++) {
                System.out.print(" ");
            }

            // Step 5: Inner loop for printing stars
            // The number of stars increases with each row (2*i + 1 stars)
            for (int k = 0; k <= i; k++) {
                System.out.print("* "); // Print star followed by a space for alignment
            }

            // Step 6: Move to the next line after printing stars for the current row
            System.out.println();
        }

        // Step 7: Close the scanner to prevent resource leaks
        scanner.close();
    }
}