# Get chapter number

I am newbie on latex, my question is how can I get a structure like:
number of chapter + title of chapter (exemple: I Introduction)
I only get Introduction, I want the number before the name. If you can see the code , I apply a code which remove "Chapter x" Code of tex file:

 \documentclass[11pt,a4paper,oldfontcommands,openany]{memoir}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{microtype}
\usepackage[dvips]{graphicx}
\usepackage{xcolor}
\usepackage{times}
% Importation package use case  %
\usepackage{tikz}
\usepackage{tikz-uml}
\usepackage{amsmath}
\usepackage{savetrees}
%FIN IMPORTATION PACKAGE USECASE%
\usepackage[
bookmarks=true,bookmarksopenlevel=2]{hyperref}
\usepackage{geometry}
\usepackage[pagestyles]{titlesec}
\usepackage{etoolbox}

% We remove chapter word {n}
\titleformat{\chapter}[display]{\normalfont\bfseries}{}{0pt}{\Large}
\newpagestyle{mystyle}
\pagestyle{mystyle}
%FIN IMPORT QUI ENLEVE CHAPTER

% PDF VIEW
% \geometry{total={210mm,297mm},
% left=25mm,right=25mm,%
% bindingoffset=0mm, top=25mm,bottom=25mm}
% PRINT
\geometry{total={210mm,297mm},
left=20mm,right=20mm,
bindingoffset=10mm, top=25mm,bottom=25mm}

\OnehalfSpacing

%%% CHAPTER'S STYLE
%chapterstyle{bianchi}%
\chapterstyle{ell}
%%% STYLE OF SECTIONS, SUBSECTIONS, AND SUBSUBSECTIONS

%%% STYLE OF PAGES NUMBERING
%\pagestyle{Ruled}

\maxsecnumdepth{subsection} % chapters, sections, and subsections are numbered

\begin{document}

%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---  % %%
%   TITLEPAGE
%

%   due to variety of titlepage schemes it is probably better to   make titlepage manually

\thispagestyle{empty}

{%%%
\sffamily
\centering
\Large

~\vspace{\fill}

\clearpage
\tableofcontents*

\chapter{Introduction} this is a chapter , I want the number before Introduction

• Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. – karlkoeller Jul 28 '15 at 6:16
• This template is a real mess, in my point of view. – user31729 Jul 28 '15 at 6:21

use

\titleformat{\chapter}[display]{\normalfont\bfseries}{\thechapter}{0pt}{\Large}
^^^^^^^^^^^^


or

\titleformat{\chapter}[block]{\normalfont\bfseries}{\thechapter}{1em}{\Large}
^^^^^^^^                      ^^^^^^^^^^^^  ^^^^


for " 1 title"

• thanks, there a little problem, the number is not near the title, I got : 1 in the 1st line and introduction in the 2nd line, how can I get whole in one line – kingmaker Jul 28 '15 at 8:01
• see edited answer – user2478 Jul 28 '15 at 8:50