Code(font and section tips):

Double "space" and an "Enter"  
represents a newline.  
   
One "space" and an "Enter" 
will not end a line.

*I'm gonna be italic form*  
**I'm gonna be in bold**

Effect(font and section tips):

Double "space" and an "Enter"
represents a newline.

One "space" and an "Enter" will not end a line.

I'm gonna be italic form
I'm gonna be in bold

Code(title):

# Headline 
## Second-level heading
### Third-level heading 
headline can also be presented in this way  
===
subheadings can be presented in this way  
---

Effect(title):

Headline

Second-level heading

Third-level heading

headline can also be presented in this way

subheadings can be presented in this way

Code(List):

- Firstly
- Secondly
- Thirdly  


1. Firstly
2. Secondly
3. Thirdly


- Firstly
 + The first point is 
 + The next is
 + Final point is
- Secondly
- Thirdly

Effect(List):

Firstly
Secondly
Thirdly

Firstly
Secondly
Thirdly

Firstly

The first point is
The next is
Final point is

Secondly
Thirdly

Code(Code):

There should be four spaces in front of a new line for code.  

C++:   

    #include <iostream>
    int main()
    {
        std::cout << "Hello, world!" << std::endl;
        return 0;
    }  
  
java:  

    public class HelloWorld 
    {
        public static void main(String args[]) 
        {
            System.out.println("Hello, World!");
        }
    }


python:  

    print 'Hello,World!'

Effect(Code):

There should be four spaces in front of a new line for code.

C++:

#include <iostream>  
int main()  
{  
    std::cout << "Hello, world!" << std::endl;  
    return 0;  
}

java:

public class HelloWorld 
{
    public static void main(String args[]) 
    {
        System.out.println("Hello, World!");
    }
}

python:

print 'Hello,World!'

Code(Image and URL):

hyperlink can be added in this way: [我的github](https://github.com/monkeydchopper)  
insert an image: ![tonytonychopper](http://upload-images.jianshu.io/upload_images/2100272-a11c8bb972955125.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)  
图侵删

Effect(Image and URL):

hyperlink can be added in this way: 我的github

insert an image:

tonytonychopper

图侵删

references:
温谦的专栏文章 http://www.ituring.com.cn/article/23

markdown语法简记