How to change the 'Section' title and its arrangement in a LaTeX document

Question

I am handing in an assignment that is structured by exercises, rather than sections. I have already written my responses using the \section{} command and would now like to structure the final output by exercises rather than sections. Concretely, I want the number to appear to the right of each exercise: Exercise 4 instead of 4 Section title.

I have been able to find information on how to do this for chapters and many other document parts here on SE, but strangely not for sections.

Here's an MWE:

\documentclass{article}
\begin{document}

\section{Exercise} % First exercise

\section{Exercise} % Second exercise

\section{Exercise} % Third exercise

\end{document}

Produces this:

Now all I really need to do is reverse the order from # Section title to Section title # because my section title is exercise. Also, ideally, the section numbering would be in roman numerals, while subsections remain as originally formatted.

Answer 1

With article class as you specified in the MWE, one can employ titlesec.

\documentclass{article}
\renewcommand{\thesection}{\Roman{section}}
\usepackage{titlesec}
\titleformat{\section}
{\normalfont\Large\bfseries}{Exercise~\thesection}{1em}{}

\begin{document}

\section{Exercise} % First exercise

\section{Exercise} % Second exercise

\section{Exercise} % Third exercise

\end{document}