tabular inside a newcommand [closed]

Question

I'm trying to define a \newcommand that has a tabular in it, but I get an:

! You can't use `macro parameter character #' in restricted horizontal mode.

Here's an example:

\newcommand{\Mytest}{1}{
\begin{tabular}{c}
    #1 \\\hline
\end{tabular}
}

Any way around this?

Answer 1

Arguments of a command should be enclosed in [] and not {}.

\newcommand{\Mytest}[1]{%
\begin{tabular}{c}
    #1 \\\hline
\end{tabular}%
}