readme file formating github code example

Example 1: githum readme bold

**This text will be bold**
__This will also be bold__

_You **can** combine them_

Example 2: what is a markdown .md file

A file with the .MD or .MARKDOWN file extension might be a Markdown Documentation file. It's a plain text file that uses the Markdown language to describe how to convert a text document to HTML. README.md is a common MD file that holds text instructions.