1.使用嵌套循环完成99乘法表的打印

public static void main(String[] args) {
        int x;
        int y;
        for (x = 1; x <= 9; x++) {
            for (y = 1; y <= x; y++) {
                System.out.print(y + "*" + x + "=" + x * y + "\t");
            }
            System.out.println();
        }
    }