How to make the exclusive or in LaTex

Question

Does anyone know how to make the symbol in the red box? It's the exclusive or. I've tried using detexify and looking up the symbol, but I haven't found anything.

Answer 1

Here is a solution using the\stackinset command from the stackengine package:

\documentclass{article}
\usepackage{stackengine}
\newcommand{\xor}{\mathrel{\stackinset{c}{}{c}{-0.15ex}{$ \vee $}{$ \bigcirc $}}}

\begin{document}

    \[ A \xor B\]%

\end{document} 

Answer 2

You can roll your own:

\documentclass{article}
\usepackage{tikz}
  \newcommand*\circledlor{\tikz[baseline=(char.base)]{\node[shape=circle,draw,inner sep=1pt] (char) {\lor};}}

\begin{document}
  \(\circledlor\)
\end{document}