Equivalent of CSS “float:left;” for images

Question

What I am try here is have the image on the left side and it should be surrounded by text on the right and bottom side.

For example how can below image_3.png float to left?

\usepackage{lipsum}
\begin{document}

\includegraphics[scale=0.5]{./images/image_3.png}
\lipsum[1]    

\end{document}

Answer 1

As Werner mentions you can use the wrapfig package:

\documentclass{article}
\usepackage[demo]{graphicx}% Don't use [demo] option in your real example
\usepackage{wrapfig}
\usepackage{lipsum}% for dummy text

\begin{document}
\begin{wrapfigure}{l}{0.5\textwidth}\centering
    \includegraphics[scale=0.5]{./images/image_3.png}
    \caption{Image3.png}
\end{wrapfigure}
\lipsum[1]
\end{document}

Answer 2

You can insert the image using wrapfig, and adjust the left and right margins through modification of \leftskip and \rightskip.

\documentclass{article}
%\usepackage{graphicx}% http://ctan.org/pkg/graphicx
\usepackage[showframe]{geometry}% http://ctan.org/pkg/geometry
\usepackage{wrapfig}% http://ctan.org/pkg/wrapfig
\usepackage{url}% http://ctan.org/pkg/url
\usepackage{lipsum}% http://ctan.org/pkg/lipsum
\begin{document}

\lipsum[1]

\addtolength{\leftskip}{5em} \addtolength{\rightskip}{2em}% Adjust margins

% \begin{wrapfigure}[<number of narrow lines>]{<placement>}[<overhang>]{<width>} <stuff> \end{wrapfigure}
\begin{wrapfigure}[6]{l}{5em}
  \rule{5em}{4\baselineskip}% place your image here using \includegraphics
\end{wrapfigure}
\noindent You can draw graphics directly with TeX commands using the \verb!tikz! package: 
\url{http://ftp.dante.de/tex-archive/help/Catalogue/entries/pgf.html} It comes 
with very good documentation with many examples.
You can draw graphics directly with TeX commands using the \verb!tikz! package: 
\url{http://ftp.dante.de/tex-archive/help/Catalogue/entries/pgf.html} It comes 
with very good documentation with many examples.

\addtolength{\leftskip}{-5em} \addtolength{\rightskip}{-2em}% Restore margins

\lipsum[2]
\end{document}​

If you're after modifying the margins of the actual image that you included, you need to modify the parameters of the wrapfigure environment:

\begin{wrapfigure}[<number of narrow lines>]{<placement>}[<overhang>]{<width>}
  <stuff>
\end{wrapfigure}

Increasing <number of narrow lines> will push the bottom further down, while increasing <width> will push the right margin further in.

For completeness, I've included lipsum for dummy text as well as url since you had an URL in your MWE. geometry (with the package option showframe) was also included to show the margin adjustment with respect to the other document elements.