# Adding math to Jekyll themed (GitHub) website

In order to use MathJax code in your Jekyll website you can add the following code to `_includes/scripts.html`

:

All the (math) text that is between `$$`

tags will be displayed as a formula on a separate line, and the `@@`

tag is used for inline math.

Then, in each post where you want to use math you need to add `mathjax: true`

to the YAML header. This lets us use inline math such as @@\int^b_a \int f(x,y)\,\mathrm{d}x\mathrm{d}y@@, and math on a separate line:

.

Note that contrary to regular latex practice, you want to avoid using a single `$`

tag to result in inline math. The reason for this is that you might want to use the dollar sign `$`

for prices without the text in between being parsed into math. For example the sentence `Each apple costs $1 and a pear $2.`

would be parsed as: Each apple costs @@1 and a pear @@2.