# Using \$\$ when typing matrices

I have this matrix:

$$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$

and I want to show a new user how to type this, by adding \$\$:

\$$$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$ \$,

which doesn't make what's inside the brackets text.

How do you fix this?

## 1 Answer

If you want some part of text not to be rendered, simply include it in backticks, like this:

$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$.


You will get: $$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$.

So you could leave a comment like:

To write down a matrix you can use the syntax $$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$ - like here $$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$.

Double dollars are not a way to achieve this - they are used for centered formulas. Writing $$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$ gives you this: $$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$

And - as you checked yourself - \$... \$ does not work in this way either. You probably used this because you are used to this from LaTeX. (Still you can use \\$ inside math mode - as in $$\$$ which renders as $$\$$ - but that's not what you need here.)

• I didn't realise you needed ` instead of \ before the dollar signs. Thanks for helping! – Toby Mak Oct 14 '18 at 2:00