Changed functions section and some minor edits.
\documentclass[12pt]{article}
\title{Interactive Plotting}
\author{FOSSEE}
\begin{document}
\maketitle
\section{Starting up...}
\begin{verbatim}
$ ipython -pylab
\end{verbatim}
Exiting Ipython
\begin{verbatim}
In [1]: print "Hello, World!"
In [2]: ^D
Do you really want to exit ([y]/n)? y
\end{verbatim}
Breaking out of loops
\begin{verbatim}
In [1]: while True:
...: print "Hello, World!"
...:
Hello, World!
Hello, World!^C
\end{verbatim}
\section{First Plot}
\begin{verbatim}
In [2]: x=linspace(0, 2*pi, 50)
In [3]: plot(x,sin(x))
Out[3]: [<matplotlib.lines.Line2D object at 0xb6e5874c>]
\end{verbatim}
\section{Labeling}
\begin{verbatim}
In [4]: xlabel('x')
In [5]: ylabel('sin(x)')
\end{verbatim}
\section{Another example}
\begin{verbatim}
In [6]: clf()
In [7]: y = linspace(0,10,101)
In [8]: plot(y, exp(-y))
In [9]: xlabel('y')
In [10]: ylabel(r'$e^{-y}$')
\end{verbatim}
\end{document}