Python代码：
#Chapter 5 by szh 2018.3.19
print("\n5.2")
print("student" == "Student")
print("student" == "Student".lower())
print(12 == 12)
print(12 != 13)
print(12 >= 13)
print(12 < 13 and 13 > 14)
print(12 > 13 or 12 < 13)
nums = [1, 2, 3, 4, 5]
print(3 in nums)
print(6 not in nums)
print("\n5.3")
alien_color = 'green'
if alien_color == 'green':
print("You got 5 points!")
print("\n5.4")
alien_color = 'yellow'
if alien_color == 'green':
print("You got 5 points!")
else:
print("You got 10 points!")
print("\n5.5")
alien_color = 'red'
if alien_color == 'green':
print("You got 5 points!")
elif alien_color == 'yellow':
print("You got 10 points!")
else:
print("You got 15 points!")
print("\n5.6")
ages = [1, 3, 10, 18, 40, 70]
for age in ages:
if age < 2:
print("He is a baby.")
elif age < 4:
print("He is learn to walk.")
elif age < 13:
print("He is a children.")
elif age < 20:
print("He is a teenager.")
elif age < 65:
print("He is a adult.")
else:
print("He is a elder.")
print("\n5.7")
favorite_fruits = ['apple', 'banana', 'watermelon']
question_fruits = ['apple', 'banana', 'watermelon', 'orange', 'kiwi']
for fruit in question_fruits:
if fruit in favorite_fruits:
print("You really like " + fruit)
else:
print("You don't like the " + fruit)
print("\n5.8")
names = ['admin', 'Alice', 'Bob', 'Eric', 'Jack']
for name in names:
if name == 'admin':
print("Hello admin, would you like to see a status report?")
else:
print("Hello " + name + ", thank you for logging in again")
输出结果：
5.2 False True True True False False True True True 5.3 You got 5 points! 5.4 You got 10 points! 5.5 You got 15 points! 5.6 He is a baby. He is learn to walk. He is a children. He is a teenager. He is a adult. He is a elder. 5.7 You really like apple You really like banana You really like watermelon You don't like the orange You don't like the kiwi 5.8 Hello admin, would you like to see a status report? Hello Alice, thank you for logging in again Hello Bob, thank you for logging in again Hello Eric, thank you for logging in again Hello Jack, thank you for logging in again