When you want to add a comment you get this:
Comments use mini-Markdown formatting: link italic bold
code. The post author will always be notified of your comment. To also notify a previous commenter, mention their user name: @peter or @PeterSmith will both work
I just don't know where to find this: ` symbol in my keyboard, I tried every button but still no luck. can somebody tell me how to add it to format a code.