insert image into markdown code example

Example 1: how to insert an image in markdown

![image info](./pictures/image.png)

Example 2: markdown embed image

![Image of Yaktocat](https://octodex.github.com/images/yaktocat.png)

Example 3: add image in markdown

![alternative text](image_name.png "Image Title")

Example 4: markdown image by address

<img src="markdownmonstericon.png"     alt="Markdown Monster icon"     style="float: left; margin-right: 10px;" />