The following code chunk demonstrates how to add functions to the current namespace during runtime:

# Time::HiRes

This modules provides high resolution timers.

# Perl UNIVERSAL

All blessed references inherit from UNIVERSAL:

# Mean Value and Mean Deviation

The most commonly used analysis of a series of measurements $x_i = x_1, \dots, x_n$ is calculating the mean value, the minimum, and the maximum as well as the mean deviation:

Names:

# Lists

List environments like itemize can be customized.

## Itemize with small item spacing:

\begin{itemize}
\setlength{\itemsep}{0mm}
\item ITEM1
\item ITEM2
\end{itemize}


## All available lengths

Length Description
\topsep Vertival space before and after list environment
\itemsep Vertical space between lines
\parsep Vertical space between paragraphs inside an item
\partopsep Vertical space before list environment if it starts a new paragraph

NOTE: You will not be able to modify topsep and partopsep inside a list environment because the space was already added at that point.

NOTE: The default values of these lengths depend on the depth of the list environment.

See Dense Lists for an example how to modify topsep and partopsep

# Horizontal Rule

Include an horizontal rule in your text:

# Floats

Floating environments allow you to have Figures to be placed automatically in sensible places by LaTeX.

# Files

Files generated by LaTeX

# CTAN

The Comprehensive TeX Archive Network (CTAN) is a valuable resources for everything related to TeX including distributions, packages and documentation.