public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int i = input.nextInt();
for (int x = 0; x <= i; x++) {
for (int y = 0; y < (i - x); y++) {
System.out.print(" ");// 打印金字塔每一行的空格
}
for (int y = 0; y < (2 * x - 1); y++) {// 打印每一行的*
System.out.print("*");
}
System.out.println();
}
}
其中打印每一行的*的代码>>>>y<(2*x-1)不理解,请全面解释下3Q