練習(xí)————用*號(hào)打印三角形

public class test_demo {
    static void main(String[] args) {
        //打印一個(gè)5行的三角形

        for (int i = 1; i <=5; i++) {
            for (int j = 5;  j>i; j--) {
                System.out.print(" ");
            }
            for (int j = 1;  j<=i; j++) {
                System.out.print("*");
            }
            for (int j = 1; j<i; j++) {
                System.out.print("*");
            }
            System.out.println();

        }
    }
}