Is there a macro in latex to write `ceil(x)`

and `floor(x)`

in short form? The long form

```
\left \lceil{x}\right \rceil
```

is a bit lengthy to type every time it is used.

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Using \DeclarePairedDelimiter from mathtools, you could define macros \ceil and \floor, which will scale the delimiters properly (if starred):

\documentclass{minimal}

\usepackage{mathtools}

\DeclarePairedDelimiter\ceil{\lceil}{\rceil}

\DeclarePairedDelimiter\floor{\lfloor}{\rfloor}

\begin{document}

\begin{equation*}

\floor*{\frac{x}{2}} < \frac{x}{2} < \ceil*{\frac{x}{2}}

\end{equation*}

\end{document}

Result:

Scaling delimiters with

`\floor`

and`\ceil`