It can be used on some websites like Stack Overflow or to write documentations essentially on GitHub. With R Markdown you can easily create reproducible data analysis reports presentations dashboards interactive applications books dissertations websites and journal articles while enjoying the simplicity of Markdown and the great power of. Also check out this LaTeX introduction.
To tell Markdown to interpret your text as LaTex surround your input with dollar signs like.
The markdown formula is very similar to the formula for markup. In addition to using numbered block mode equation syntax for standard numbering ie. When doing md rightarrow tex rightarrow pdf LaTeX takes care of the math but to render the math in html we use MathJax. Markdown which is a markup language that is a superset of HTML.