if判断
格式
python
car = "xiaomi"
if car == "bms":
print(True)
elif car == "xiaomi":
print("小米汽车")
else:
print(False)布尔表达式
- True
- False
条件表达式
- ==
- !=
- and
- or
- in
- not in
列表判空
python
menu_list = []
if menu_list:
print("列表不为空")
else:
print("列表为空")while循环
python
message = ""
while message != 'exit':
message = input("请输入：")
print(message)