# [Tex/LaTex] Change chapter command

I am using the book class, is there a way to modify the \chapter command to avoid the "Chapter #" above the chapter name and keeping it numbered? Normally I get, for example

Chapter 2

The flight of the Bumblebee


But I would like only

The flight of the Bumblebee


One possibility using the titlesec package:

\documentclass{book}
\usepackage{titlesec}
\usepackage{lipsum}% just to generate text for the example

\titleformat{\chapter}[display]
{\normalfont\bfseries}{}{0pt}{\Huge}
\titlespacing*{\chapter}
{0pt}{20pt}{40pt}

\begin{document}

\chapter{The flight of the Bumblebee}
\lipsum[4]

\end{document}


Without packages, one can redefine \@makechapterhead as implemented in book.cls:

\documentclass{book}
\usepackage{lipsum}% just to generate text for the example

\makeatletter
\vspace*{20\p@}%
{\parindent \z@ \raggedright \normalfont
\interlinepenalty\@M
\Huge \bfseries #1\par\nobreak
\vskip 40\p@
}}
\makeatother

\begin{document}

\chapter{The flight of the Bumblebee}
\lipsum[4]

\end{document}


In the previous example I decreased some vertical space before the title; if one doesn't want this, one can simply (as Mico suggests in his comment) \let \@makechapterhead (controlling formatting for headings for numbered chapters) to be \@makeschapterhead (controlling formatting for headings for numbered chapters):

\documentclass{book}
\usepackage{lipsum}% just to generate text for the example

\makeatletter