Course notes_zero-based introductory learning Python_001_ my first close contact with Python

My first close contact with Python

• Download and open Python Shell;

• Perform input and output tests:

  >>> print("i love you") #注释的方法
  i love you
  
  >>> print(5+3) #注意是没有双引号的,双引号表示文本
  8
  
  >>> 5+3 #直接做加法
  8
  
  >>> 1234567890987654321*987654321123456789 #可以计算比较长的位数,没有长度限制
  1219326312254229535413808882112635269
  
  >>> print("well water"+" river")
  well water river
  
  >>> print("i love you " *8)
  i love you i love you i love you i love you i love you i love you i love you i love you
  
  >>> print("i love you "+8)
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
  TypeError: can only concatenate str (not "int") to str