## Sectioning

Sectioning commands provide the means to structure your text into units.

• `\part`
• `\chapter` (report and book class only)
• `\section`
• `\subsection`
• `\subsubsection`
• `\paragraph`
• `\subparagraph`

All sectioning commands take the same general form, i.e.,

`\chapter[optional]{title}`

In addition to providing the heading in the text, the mandatory argument of the sectioning command can appear in two other places:

You may not want the same thing to appear in these other two places as appears in the text heading. To handle this situation, the sectioning commands have an `optional` argument that provides the text for these other two purposes.
All sectioning commands have `*`-forms that print a title, but do not include a number and do not make an entry in the table of contents.