## 基本类型
```
Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
>>> type(1.111)
<class 'float'>
>>> type(11)
<class 'int'>
>>> type(1+1)
<class 'int'>
>>> type(1+1.001)
<class 'float'>
>>> type(1*1)
<class 'int'>
>>> type(1*9.01)
<class 'float'>
>>> type(2/2)
<class 'float'>
>>> type(2//2)
<class 'int'>
>>> 2/2
1.0
>>> 2//2
1
>>> 1//2
0
>>> 1/2
0.5
>>>
```
> 注意：单双杠和双双杠的区别：
>> 单斜杠：除法，但是会自动转换为`浮点型`，eg：`2/2
= 1.0`
>> 双斜杠：整除，只会保留整数部分，eg：`2//2
= 1`
