for else 使用方法

 1 import random
 2 num=random.randint(1,100)
 3 print(num)
 4 for i in range (3):
 5     great=input("请输入整数：")
 6     great=int(great)  #str转换int格式
 7     if great == num :
 8         print("恭喜你猜对了")
 9         break
10     elif great>num:
11         print("猜大了")
12     else:
13         print("猜小了")
14 else:
15     print("猜数失败，超过3次")