Perpendicular (⟂, ⫫) and Not Perpendicular (⟂̸) symbol in LaTeX

In this tutorial, I will show you how to get Perpendicular, Double Perpendicular, and Not Perpendicular symbols in a LaTeX document.

The following table lists the default commands and output of these symbols. take a look.

Name	Command	Output
Perpendicular	\perp
Not Perpendicular	\not\perp
Double Perpendicular	\perp\!\!\!\!\perp

\documentclass{article}
\begin{document}

  $$\verb|X\perp Y| \rightarrow X\perp Y$$
  $$\verb|X\not\perp Y| \rightarrow X\not\perp Y$$
  $$\verb|X\perp\!\!\!\!\perp Y| \rightarrow X\perp\!\!\!\!\perp Y$$

\end{document}

Output:

Not Perpendicular with other packages

A lot of packages provide commands to get different styles of Not Perpendicular symbols.

Package	Command	Output
None	\not\perp
MnSymbol	\nperp
MnSymbol	\not\perp
mathabx	\notperp
mathabx	\not\perp
fdsymbol	\nperp
fdsymbol	\not\perp