[Tex/LaTex] Custom LaTeX chapter

Question

Be default chapters look like:

Chapter 1

Chapter name.

How can I make chapters in LaTeX look something like this?

Chapter 1. Chapter Name.

That is: add a dot after chapter number, and place the chapter name straight after the chapter number.

Answer 1

You can use the titlesec package:

\documentclass{book}
\usepackage{titlesec}

\titleformat{\chapter}
  {\normalfont\huge\bfseries}{\chaptertitlename\ \thechapter.}{20pt}{\huge}

\begin{document}

\chapter{Test Chapter}

\end{document}