Begin/end a logical block?

Question

Can I create a logical block (like HTML div element), so I can apply features like \centering locally, but not affect the outside environment?

Answer 1

Yes. The most basic of these blocks are braces { (for opening) and } (for closing). You can also use \begingroup and \endgroup or \bgroup and \egroup.

When defining your own environment <env>, using \begin{<env>} ... \end{<env>} necessarily forms a group, localizing most modifications.