View Code of Problem 53

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		for(int i = 1;i <= n;i++) {
			for(int j = 1;j <= n-i;j++) {
				System.out.print(" ");
			}
			for(int k = 1;k <= 2*i-1;k++) {
				System.out.print("*");
			}
			System.out.println();
		}
		for(int i = n - 1;i >= 1;i--) {
			for(int j = 1;j <= n-i;j++) {
				System.out.print(" ");
			}
			for(int k = 1;k <= 2*i-1;k++) {
				System.out.print("*");
			}
			System.out.println();
		}
	}
}