백준 알고리즘 2444번: 별 찍기 - 7 - JAVA

https://www.acmicpc.net/problem/2444

 

 

 

import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        int num = sc.nextInt();
        
        for (int i = 1; i <= num; i++) {
            for (int j = 0; j < num - i; j++) {
                System.out.print(" ");
            }
            for (int k = 0; k < 2 * i - 1; k++) {
                System.out.print("*");
            }
            System.out.println();
        }
        
        for (int i = num - 1; i >= 1; i--) {
            for (int j = 0; j < num - i; j++) {
                System.out.print(" ");
            }
            for (int k = 0; k < 2 * i - 1; k++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}