Python从入门到实践重点整理及习题

Python从入门到实践重点整理及习题

#@用户输入与while循环
#@while循环

prompt = "\nTell me something, and I will repeat it back to you:"
prompt += "\nEnter 'quit' to end the program. "
message = ""
while message != 'quit':
    message = input(prompt)
    if message != 'quit':
        print(message)

#@使用标志
prompt = "\nTell me something, and I will repeat it back to you:"
prompt += "\nEnter 'quit' to end the program. "
action = True
while action:
	message = input(prompt)
	if message == 'quit':
		action = False
	else:
		print(message)

#@使用break退出循环"
prompt = "\nPlease enter the name of a city you have visited"
prompt += "\n(Enter 'quit' when you are finished.) "

while True:
    city = input(prompt)
    if city == 'quit':
        break
    else:
        print("I'd love to go to " + city.title() + "!")
#@在循环中使用continue
current_number = 0
while current_number < 10:
    current_number += 1
    if current_number % 2 == 0:
       continue																														
    print(current_number)

'''  
@@@ 
有家电影院根据观众的年龄收取不同的票价：不到3岁的观众免费；3~12岁的观众为10美元；超过12岁的观众为15美元。请编写一个循环，在其中询问用
户的年龄，并指出其票价。
在while 循环中使用条件测试来结束循环。
使用变量active 来控制循环结束的时机。
使用break 语句在用户输入'quit' 时退出循环。
@@@
'''
active = True
while active:
    print("Enter 'quit' when you are finished.")
    age = input("请输入你的年龄：")
    if age == 'quit':
        active = False
    elif int(age) < 3:
        print("The price of you is free.")
    elif 3 <= int(age) <12:
        print("The price of you is $10.")
    elif 12 <= int(age) :
        print("The price of you is $15.")