How to write paragraphs in Markdown?

Paragraphs are written just by typing one or more lines of the text. One blank line is used to separate paragraphs in Markdown. This means at the end of a paragraph, you have to press return twice and then type the next paragraph.

Markdown HTML Output
Markdown is a text to HTML tool used by websites such as GitHub, StackOverflow, Discourse, etc.

Markdown is very handy and easy to learn.
<p>Markdown is a text to HTML tool used by websites such as GitHub, StackOverflow, Discourse, etc.</p>
<p>Markdown is very handy and easy to learn.</p>