java流程控制
打印三角形
public static void main(String[] args) {
//打印三角形 5行for (int i = 0; i <= 5; i++) {
for (int j = 5 - i; j >= 0; j--) {
System.out.print(" ");}for (int j = 1; j <= i; j++) {
System.out.print("*");}for (int j = 0; j <= i; j++) {
System.out.print("*");}System.out.println();}}