[Tex/LaTex] Why \texttt and \verb giving errors when using with LaTeX commands inside their input

Question

On latest version of MikTeX, following works:

\begin{align*}
\int sinxdx && \texttt{test line 1}\\
\int{sinx}dx && \texttt{test line 2}\\
\end{align*}

But the following gives error:

\begin{align*}
\int sinxdx && \texttt{\int sinxdx}\\
\int{sinx}dx && \texttt{\int{sinx}dx}\\
\end{align*}

The error:

Underfull \hbox (badness 10000) in paragraph at lines 94--102
[2] [3]
Overfull \hbox (40.0189pt too wide) detected at line 168
\OML/cmm/m/it/10.95 a=c \OMS/cmsy/m/n/10.95

When using \verb, the following is also giving a similar error:

\begin{align*}
\int sinxdx && \verb|test line 1|\\
\int{sinx}dx && \verb|test line 2|\\
\end{align*}

Answer 1

To get verbatim content inside the align* environments, my verbatimbox package can help.

\documentclass{article}
\usepackage{amsmath,verbatimbox}
\begin{document}
\begin{myverbbox}{\lineA}\int \sin x\,dx\end{myverbbox}
\begin{myverbbox}{\lineB}\int{\sin x}\,dx\end{myverbbox}
\begin{align*}
\int \sin x\,dx && \lineA\\
\int{\sin x}\,dx && \lineB\\
\end{align*}
\end{document}

For the other issue of \texttt, try \mathtt instead, which processes its argument in math mode.

---

ADDENDUM

The OP asks if this can be done without an additional package. Perhaps this would suffice:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*}
\int \sin x\,dx && \texttt{\string\int~\string\sin~x\string\,dx}\\
\int{\sin x}\,dx && \texttt{\string\int\string{\string\sin~x\string}\string\,dx}
\end{align*}
\end{document}