#  -*- coding: utf-8 -*-
print("Hello world!")    # Hello world! 这里使用了 Python3.0+的语法. 
print("Hello again!")
print("I like typing this.")
print('Yay! Printing.')
print("I'd much rather you 'not'.") #双引号里面使用了单引号
print('I "said" do not touch this.') #单引号里面使用双引号