Where does the output of the `\showthe` command go to under AUCTeX?

Question

Consider the following LaTeX document.

\documentclass{article}
\begin{document}
\showthe\parindent
\end{document}

According to p. 215 of Donald Knuth's The TeXbook, 20th revised printing (Addison-Wesley 1991)

TeX's primitive command '\showthe' will display on your terminal exactly what '\the' would produce in an expanded definition; the expansion is preceded by '>' and followed by a period. For example, '\showthe\parindent' will display
> 20.0pt.
if the plain TeX paragraph indentation is being used.

Where is the output of the \showthe primitive directed to by AUCTeX?

Answer 1

The output from LaTeX compilation should appear in a buffer named */path/to/source.tex output*. Using your example I see on my system:

...
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsa.fd)
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsb.fd)
> 17.0pt.
l.56 \showthe \parindent
...