Introduction to Perl
The original swiss-army chainsaw of text processing.
What Perl is, why it matters, and how to navigate this track.
Perl is the original swiss-army chainsaw of text processing — powerful, pragmatic, and still everywhere on Unix systems.
What is Perl?
Perl is a dynamic language renowned for regular expressions and text manipulation.
It glued the early web together and still powers a great deal of sysadmin and bioinformatics tooling.
Your first example
Here is Perl saying hello. Read it top to bottom — every line earns its place.
print "Hello, world!\n";Hello, world!
Why learn Perl?
- Unmatched regular-expression and text-processing power.
- Pre-installed on virtually every Unix system.
- CPAN — one of the largest module archives anywhere.
Where it is used
- Text processing
- System administration
- Bioinformatics
- Legacy web (CGI)
How this track works
Every topic here has four views, switchable with the tabs at the top of each page:
- Learn — the clear, practical walkthrough you are reading now.
- Deep — every detail: edge cases, the full API, and what is really happening.
- Reference — a scannable, no-fluff lookup for when you already know the shape.
- Cheatsheet — the one-page summary, printable, for quick recall.
More like this
HTML Headings
h1 through h6 are the page’s table of contents. Use them for structure, never for size — that’s what CSS is for.
HTML Headings
h1–h6 are instances of HTMLHeadingElement. They take no special attributes — only the global set and ARIA — but there’s real depth in how they form the document outline and what you can do with them from JavaScript.
Liked this one?
Pass it on
Discussion
Be the first to ask
Your questions stay private with the team. We can pin answers to share with everyone.
Sign in to ask a question privately on this tutorial.
Sign inNo pinned answers yet for this tutorial.