\documentclass[12pt,a4paper]{report}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{times}  
%\usepackage{txfonts} 
\usepackage{titlesec}  
\usepackage{tocloft}
\usepackage{listings} % for listing code in the report
\usepackage{color}
\usepackage[left=3.5cm,top=2cm,right=3cm,bottom=2cm]{geometry}
\renewcommand\cftchapfont{\large\bfseries}
\renewcommand\cftsecfont{\large}
\renewcommand\cftchappagefont{\large\bfseries}
\renewcommand\cftsecpagefont{\large}
\renewcommand{\contentsname}{List of Experiments}
\renewcommand{\chaptername}{Experiment} % rename chapter as experiment
  
\titleformat{\chapter}[display]
{\normalfont\filcenter%
	\Large% %change this size to your needs for the first line
	\bfseries}{\chaptertitlename\ \thechapter}{20pt}{%
	\Large %change this size to your needs for the second line
}
\definecolor{codegreen}{rgb}{0,0.6,0}
\definecolor{gray}{rgb}{0.5,0.5,0.5}
\definecolor{mauve}{rgb}{0.58,0,0.82}
\lstset{%frame=tb,
	language=Python,
	aboveskip=3mm,
	belowskip=3mm,
	showstringspaces=false,
	columns=flexible,
	basicstyle={\small\ttfamily},
	numbers=none,
	numberstyle=\tiny\color{gray},
	keywordstyle=\color{blue},
	commentstyle=\color{codegreen},
	stringstyle=\color{mauve},
	breakatwhitespace=true
	tabsize=3
}
%*********************Figures*****************************
% Save all figures in the folder figures and include them in your 
% report using the command \includegraphics{figure-name}
\graphicspath{{figures/}}
% figure files can be in jpeg,jpg, png or pdf formats
\begin{document}
	
	%****The entries in this section are to be filled in by the student with appropriate values *************
	
	% These values are used thoroughout the report 
	% please fill in the appropriate values
	
	\gdef \lab_title{ROBOTICS LAB} % Lab title
	\gdef \course_code{221 LIA 001}
	\gdef \doc_name{Lab Record}
	\gdef \author{Student Name}	 %student name
	\gdef \semester{1}
	\gdef \dept{Electronics and Communication Engineering} %Department
	\gdef \degree{Master of Technology} %degree
	\gdef \stream{Robotics \& Automation} %branch
	\gdef \college{College of Engineering}
	\gdef \collegePlace{Trivandrum}
	\gdef \rollno{TVE22ECRA0XY} %KTU Reg No
	\gdef \month{FEBRUARY 2023} %Month of Report submission
	
	\gdef \faculty{Joaquim Ignatious Monteiro} %faculty in charge
	\gdef \facultydes{Assistant Professor}%faculty designation
	
	
	
	\gdef \acadyear{2022 - 23} % Academic year
	
	\include{title_page}
	\include{certificate}
	
	\thispagestyle{empty}
	\newpage
	
	\pagenumbering{roman} 
	%%**********************Table of Contents***********************
	\thispagestyle{empty}
	\newpage
	\tableofcontents
	%\listoffigures
	%\listoftables
	%\include{symbol} %List of Symbols (Optional) comment if not required.
	% symbold may be added in the file symbol.tex
	
	%%********************Body of the report**********
	
	\cleardoublepage
	\setcounter{page}{1}
	\pagenumbering{arabic} 	% Arabic numbering is used in the body of the report
	
	
	
	
	%%*******************EXPERIMENT FILES***************
	
	%
	% Save all experiment files as separate tex files in the folder lab_exp
	% Use \input command to include them in your report
	
	% Save the python script files in the folder code and include them 
	% in your report using \lstinputlisting command
	
	\input{lab_exp/exp1_ros_intro}   % include experiment 1 file
	\input{lab_exp/exp2_pub_sub}   % include experiment 2 file
	
\end{document}