To attach code you need to write 3 of the ``` symbol in a row, like below:
```print("Hello, world!");```
and close up with 3 more to close the code block.

Then your message will look like this:

print("Hello, world!");

Read more about syntax highlighting here: https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet#code

After recieving Help

You are more then welcome to mark the post that helped you. You can choose “This is the best answer” in your own discussion thread on any post you like, even your own.
To mark a post as the best answer you do like this. Expand each step for a more detailed explanation.

Hover the post with your mouse

To hover the post with your mouse gives you three different options in the lower right corner.

Choose the option ...

When holding your mouse over the message you see three alternatives, “Like, Reply and …”, click on the alternative … and select the option Select Best Answer

Revert or Remove the Best Answer

You can remove or revert the Best Answer same way as you marked it. Follow the steps above, the text “This is the best Answer” is replaced with the text to remove the best answer.