PrintTriangle2

import java.util.Scanner;

public class PrintTriangle2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter n:");

        String input = scanner.nextLine();
        while (!input.matches("\\d+")) {
            System.out.println("Enter correct number!");
            input = scanner.nextLine();
        }
        int n = Integer.parseInt(input);
        for (int i = n; i >= 1; i--) {
            for (int j = n; j >= 1; j--) {
                if (j > i) {
                    System.out.print(" ");
                } else
                    System.out.print("#");
            }
            System.out.println();
        }
    }
}