# Difference between `$$...`

, `\[...`

, and `\begin{equation*}...`

** Published:**

I have been using \(\LaTeX\) for over 20 years now. When I write a displayed equation without numbering on a single line, I have been using `$$...$$`

because it was simple. I didn’t understand why some people use `\[...\]`

, because the latter takes more time to type and is not necessarily easy to read. Today I read this article and learned that `$$...$$`

is incorrect. From now on, I will switch to `\begin{equation*}...\end{equation*}`

because it is easy to read and we can add equation numbering by deleting `*`

if we change our mind.