I want to put a space between the paragraph header and the paragraph itself. But all I have tried so far, didn't work. Using \paragraph the header and the body are in the same line, whereas I want to skip at least a line between the header and the body of paragraph.
\documentclass[oneside,12pt]{book}
\usepackage[french]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\begin{document}
\section{section}
\subsection{subsection}
\subsubsection{subsubsection}
\paragraph{the header}
\vspace{1cm} % I want to skip a line or add space between header and the body of paragraph
body of the paragraph
\end{document}
I am using a book document, for all the answers I have seen so far are for article document or for scrbook document.