Introduction to Perl for Unix System Administrators

(Perl without excessive complexity)

by Dr Nikolai Bezroukov

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Chapter 2: Perl Overview

Version 0.75

2.1. Hello World in Perl

2.2. Overview of Perl Lexical Structure, Syntax and Operators

2.3. Perl Variables

2.4. Basic Control Structures

2.5. Typical errors and pitfalls

2.6. Homework

This chapter provide a general overview of Perl. The problem here is that it's impossible to construct a very logical sequence of chapters in such a way that material of nest would be completely based on than previous. So here is have something like view of Perl kingdom from a helicopter. Foot travel is necessary to get the full picture, but it's much more time consuming :-).

You should use Perl man pages as a reference. We provided slightly modified and annotated man pages at your convenience at www.softpanorama.org

Both Perl and C/C++ share the same basic rules and layout:

Scripts are executed sequentially, on a statement by statement basis.
Statements must be terminated by a semicolon, statements can be separated by new lines.
Blocks are delimited by braces.
Functions can be defined before or after you use them.

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Last modified: September 06, 2009