python笔记-005-判断

# ★判断语句：ifcars = ['audi', 'bmw', 'subaru', 'toyota']for car in cars:    if car == 'bmw':        print(car.upper())    else:        print(car.title())# ★判断是否相等区分大小写car = 'audi'print(car == 'Audi')  # 结果为False# 上述问题如果大小写无关紧要，可以使用car.upper()或car.lower()后进行判断# 判断是否不想等（!=）car = 'audi'print(car != 'Audi')  # 结果为True# ★检查多个条件：且（and）aaa = 18if aaa > 10 and aaa < 20:    print(aaa)else:    print('error')# ★检查多个条件：或（or）aaa = 1if aaa > 10 or aaa < 20:    print(aaa)else:    print('error')# ★检查特定值是否在列表中（in/not in）cars = ['audi', 'bmw', 'subaru', 'toyota']print('audi' in cars)  # Trueprint('AUDI' in cars)  # Falseprint('======')print('audi' not in cars)  # Falseprint('AUDI' not in cars)  # True# ★if-elif-else结构score = 88if score < 60:    print('C')elif 60 <= score < 80:    print('B')else:    print('A')# 并不一定需要（else）