Automatic Section Title & Section Title Before Section Number

Question

I'm trying to do 3 things:

1. Repeat a section title automatically for each section (e.g., "Chapter").
2. Place the section title before the section number (e.g., "Chapter 1" and NOT "1 Chapter").
3. Make each section number 2 digits long (e.g., "Chapter 01" and NOT "Chapter 1").

I've been able to find how to do each of these 3 things individually but not altogether.

Answer 1

1. The standard book and report document classes give you \chapter which does what you need by default.

2. The standard book and report document classes give you \chapter which does what you need by default.

3. You can use the kernel's \two@digits.

The code:

\documentclass{book}

\makeatletter
\renewcommand\thechapter{\two@digits{\value{chapter}}}
\makeatother

\begin{document}

\chapter{Test chapter}

\end{document}

In case what you are trying to achieve is a running title, use titlesec to change the formatting from display to block:

\documentclass{book}
\usepackage{titlesec}

\makeatletter
\renewcommand\thechapter{\two@digits{\value{chapter}}}
\makeatother
\titleformat{\chapter}[block]
  {\normalfont\huge\bfseries}
  {\chaptertitlename\ \thechapter}
  {1em}
  {}

\begin{document}

\chapter{Test chapter}

\end{document}