View Code of Problem 53

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		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 j=1;j<=2*i-1;j++) {
				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 j=1;j<=2*i-1;j++) {
				System.out.print("*");
			}
			System.out.println();
		}
	}

}