[Tex/LaTex] Removing the zero in the chapter numbering

chaptersnumberingtable of contents

I have a line of code to hide "Chapter" and just head every chapter in the format "ChapterNumber" + "." + "ChapterTitle".
However, the Table of Contents is assumed to be "Chapter 0", so it shows "0. Contents". Is there any way to hide this "0." so it shows "Contents" only?

Code used:

\documentclass[a4paper,12pt,twoside]{report}
\usepackage[utf8]{inputenc}
\usepackage{titlesec}
\newcommand{\sectionbreak}{\clearpage}
\titleformat{\chapter}{}{}{0em}{\bf\LARGE\thechapter.~}

How the zero appears in the Contents table

Best Answer

Note that I used \bfseries instead of the long, long deprecated \bf and used \arabic{chapter} to format the number, you might also want to try \Roman{chapter} for example.

Update: second version (thanks to egreg)

As this answer is the checked one, I'll include egregs more correct one, which uses correctly the possibilities of \titleformat, which has 4 mandatory arguments:

\titleformat{<command>}{<format>}{<label>}{<sep>}{<before-code>}

<command> is the sectioning command you want to change, in your case \chapter.
<format> are text formatting commands to be applied, you want to use \bfseries\Large
<label> formats the label if the chapter is numbered, it is left out when not. You want \arabic{chapter}.~
<sep> is the hspace between <label> and the actual title, set it to {0pt}
<before-code> is arbitrary code that should be called before the title is typeset

So your version of \titleformat should be:

\titleformat{\chapter}{\bfseries\Large}{\arabic{chapter}.~}{0pt}{}

First Version, you should not use this:

You can check if \thechapter is greater than zero:

\documentclass[a4paper,12pt,twoside]{report}

\usepackage{titlesec}

\titleformat{\chapter}{}{}{0em}{\bfseries\LARGE\ifnum\value{chapter}>0\relax\arabic{chapter}.~\fi}

\begin{document}
\tableofcontents
\chapter{Test I}
\chapter{Test II}
\end{document}

Output: Table of contents:

Table of Contents

First Chapter with some blindtext:

Chapter 1

Related Solutions

[Tex/LaTex] How to remove chapter numbering without removing it from table of contents

By adding \setcounter{chapter}{n} before the nth chapter seems to fix the numbering of subsections issue. Also though, you have to reset the numbering of sections. An easy way to do this would to just define a new command. For example:

\documentclass{report}
\newcommand{\mychapter}[2]{
    \setcounter{chapter}{#1}
    \setcounter{section}{0}
    \chapter*{#2}
    \addcontentsline{toc}{chapter}{#2}
}
\begin{document}
\tableofcontents
\mychapter{0}{Acknowledgments}
\mychapter{1}{Introduction}
\section{Introduction}
\section{Further Introduction}
\mychapter{2}{Experiments}
\section{Experiment One}
\section{Experiment Two}
\end{document}

Chapters have no numbers, sections follow numbering that would be there if chapters had

[Tex/LaTex] Change title of Table of Contents

Typo: it is called \captionsenglish not \captions\english