- $\floor x$
The $\LaTeX$ code for \(\floor x\) is
\floor x .
- $\sqbrk x$
For $x \in \R$, the greatest integer less than or equal to $x$.
$\sqbrk x$ has been (or is in the process of being) superseded by $\floor x$, due to the already widespread uses of square brackets.
The $\LaTeX$ code for \(\sqbrk x\) is
\sqbrk x .