demo.py(if,elif,else):
holiday_name = "生日"
if holiday_name == "情人节":
print("买玫瑰")
print("看电影")
elif holiday_name == "平安夜":
print("买苹果")
print("吃大餐")
elif holiday_name == "生日":
print("买蛋糕")
else:
print("每天都是节日啊")
demo.py(and,or 拼接多个逻辑判断):
age = 12
if age >= 0 and age <= 120:
print("年龄正确")
else:
print("年龄不正确")
demo.py(not 取反):
is_employee = False
if not is_employee:
print("非本公司人员,请勿入内")