用户交互和注释

用户交互

• 等待用户操作后再执行程序

示例

• name = input ("what's your name")
  print("hello" , name)
  name = input("what's your name？")
• age = input("How old are you？")
  hometown = input("Where is your hometown？")
  print("hello", name , "you are ",age," years old, you came from", hometown)

代码注释用#，可以中文也可以英文