Subsection title style

Question

How can i get this result?

The subsection number is a part of subsection title and it begins from par indent. If subsection title is to long it continues from new line as normal text (It is not aligned to the left side as in normal TeX document).

Answer 1

Try this, which works for English and the article class.

% subsectitleprob.tex  SE 623138
\documentclass{article}
\makeatletter
%% block paragraph for divisional titles (instead of hanging)
\renewcommand{@hangfrom}[1]{\noindent #1}
\makeatother
\begin{document}
\section{Not too long section title}
Some cectional text.
\subsection{This is a subsection title that takes more than a single line to print}
Some subsectional text.
\end{document}