Python编程 从入门到实践 练习5-1、5-2
2020-07-12 17:11
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5-1 条件测试
car = 'subaru' print("Is car == 'subaru'? I predict True.") print(car == 'subaru') print("\nIs car == 'audi'? I predict False.") print(car == 'audi') print("\nIs car != 'subaru'? I predict False.") print(car != 'subaru') print("\nIs car != 'audi'? I predict True.") print(car != 'audi') age = 18 print("\nIs his age > 18? I predict False.") print(age > 18) print("\nIs his age < 18? I predict False.") print(age < 18) print("\nIs his age >= 18? I predict True.") print(age >= 18) print("\nIs his age <= 18? I predict True.") print(age <= 18) print("\nIs his age == 18? I predict True.") print(age == 18) print("\nIs his age != 18? I predict False.") print(age != 18)
car = 'subaru' #检查两个字符串相等或不等 print("Is car == 'subaru'? I predict True.") print(car == 'subaru') print("\nIs car == 'audi'? I predict False.") print(car == 'audi') print("\nIs car != 'subaru'? I predict False.") print(car != 'subaru') print("\nIs car != 'audi'? I predict True.") print(car != 'audi') #检查两个数字相等、不等、大于、小于、大于等于和小于等于 age = 18 print("\nIs his age > 18? I predict False.") print(age > 18) print("\nIs his age < 18? I predict False.") print(age < 18) print("\nIs his age >= 18? I predict True.") print(age >= 18) print("\nIs his age <= 18? I predict True.") print(age <= 18) print("\nIs his age == 18? I predict True.") print(age == 18) print("\nIs his age != 18? I predict False.") print(age != 18) #使用函数lower()的测试 name = 'Alice' print("\nIs name.lower() == 'alice'? I predict True") print(name.lower() == 'alice') print("\nIs name.lower() == 'bob'? I predict False") print(name.lower() == 'bob') #使用关键字and和or的测试 print("\nIs name == 'alice' and car == 'audi'? I predict False") print(name == 'alice' and car == 'subaru') print("\nIs name == 'alice' or car == 'audi'? I predict True") print(name == 'alice' or car == 'subaru') #测试特定的值是否包含在列表中 cars = ['subaru', 'audi'] print("\nIs car in cars? I predict True") print(car in cars) new_car = 'bmw' print("\nIs new_car in cars? I predict False") print(new_car in cars) #测试特性的值是否未包含在列表中 print("\nIs car not in cars? I predict False") print(car not in cars) print("\nIs new_car not in cars? I predict True") print(new_car not in cars)
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