143 : 반복제어문3 - 형성평가4

Java

import java.util.Scanner;
 
public class Main {
    public static void main (String[] arg) {
        Scanner sc = new Scanner(System.in);
        int line = sc.nextInt();
 
        // 위 삼각형
        for (int i=0; i<line; i++) {
            for (int k=0; k<i; k++)
                System.out.print(" ");
 
            for (int j=0; j<((2*(line-i))-1); j++)
                System.out.print("*");
 
            System.out.print('\n');
        }
 
 
        // 아래 삼각형
        for (int i=1; i<line; i++) {
            for (int k=0; k<(line-i-1); k++)
                System.out.print(" ");
 
            for (int j=0; j<((2*i)+1); j++)
                System.out.print("*");
 
            System.out.print('\n');
        }
    }
}