python學習之InPut（）和While循環知識講解

python學習之InPut（）和While循環知識講解

下面為學習筆記

message = input("Tell me something, and I will repeat it back to you: ")
print(message)
name = input("Please enter your name: ")
print("Hello, " + name + "!")
# 使用函數input()時， Python將用戶輸入解讀為字符串。
# 為解決這個問題，可使用函數int()，它讓Python將輸入視為數值。函數int()將數字的字符
# 串表示轉換為數值表示，如下所示:
age = input("How old are you ")
age = int(age)
if age >= 18:
 print('true')
# 處理數值信息時， 求模運算符（ %）是一個很有用的工具，它將兩個數相除并返回余數：
print(4%3)
# 如果你使用的是Python 2.7，請使用raw_input()而不是input()來獲取輸入。
current_number = 1
while current_number <= 5:
 print(current_number)
 current_number += 1
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)
# 要立即退出while循環，不再運行循環中余下的代碼，也不管條件測試的結果如何，可使用
# break語句。
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() + "!")
# 要返回到循環開頭，并根據條件測試結果決定是否繼續執行循環，可使用continue語句，它
# # 不像break語句那樣不再執行余下的代碼并退出整個循環。
current_number = 0
while current_number < 10:
 current_number += 1
 if current_number % 2 == 0:
  continue
 print(current_number)
responses = {}
# 設置一個標志，指出調查是否繼續
polling_active = True
while polling_active:
# 提示輸入被調查者的名字和回答
 name = input("\nWhat is your name ")
 response = input("Which mountain would you like to climb someday ")
# 將答卷存儲在字典中
 responses[name] = response
# 看看是否還有人要參與調查
 repeat = input("Would you like to let another person respond (yes/ no) ")
 if repeat == 'no':
  polling_active = False
# 調查結束，顯示結果
print("\n--- Poll Results ---")
for name, response in responses.items():
 print(name + " would like to climb " + response + ".")