Perl

Perl is a programming language created in 1987 by Larry Wall.

Perl is a family of high-level, general-purpose, interpreted, dynamic programming languages. The languages in this family include Perl 5 and Perl 6. Though Perl is not officially an acronym, there are various backronyms in use, including "Practical Extraction and Reporting Language". Read more on Wikipedia...

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the Perl website
the Perl Wikipedia page
PLDB estimates there are currently 13k job openings for Perl programmers.
file extensions for Perl include pl, pm, t, pod, al, cgi, fcgi, perl, ph, plx and psgi
Check out the 83 Perl meetup groups on Meetup.com.
There are 15,510 members in the Perl subreddit
There are 2,433 Project Euler users using Perl
In the 2021 StackOverflow developer survey Perl programmers reported a median salary of $80,000. 2% of respondents reported using Perl. 2,028 programmers reported using Perl, and 1,175 said they wanted to use it
Explore Perl snippets on Rosetta Code
Perl is listed on HOPL
Perl ranks #15 in the TIOBE Index
There is a CodeMirror package for syntax highlighting Perl
There is a Monaco package for syntax highlighting Perl
Pygments supports syntax highlighting for Perl
GitHub supports syntax highlighting for Perl
There are 4 Jupyter Kernels for Perl: 1,2,3,4
There is a central package repository for Perl
Indeed.com has 8,795 matches for "perl engineer".
perl.org was registered in 1995
See also: PEARL, C, Lisp, Pascal, sed, CoffeeScript, ECMAScript, Falcon, Groovy, JavaScript, Julia, LPC, Perl 6, PHP, Python, Ruby, PowerShell, Unix, Bourne shell, Regular Expressions, Unicode, Haskell, Parrot, DTrace, JSON, awk, Fortran, S-expressions, Yacc, Bison, SQL, HTML, XS, RFC, JVM, APL, Perl Data Language, Pod
Have a question about Perl not answered here? Open an issue explaining what you need.
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Example code from Riju:

print("Hello, world!\n");

Example code from hello-world:

#!/usr/bin/perl
print "Hello World\n";

Example code from the Hello World Collection:

# Hello world in perl

print "Hello World!\n";

Example code from Linguist:

#!/usr/local/bin/perl
print "Perl\n"

Example code from Wikipedia:

#!/usr/bin/perl
use strict;
use warnings;
use IO::Handle;

my ( $remaining, $total );

$remaining = $total = shift(@ARGV);

STDOUT->autoflush(1);

while ( $remaining ) {
    printf ( "Remaining %s/%s \r", $remaining--, $total );
    sleep 1;
}

print "\n";

Keywords in Perl

__DATA__ else lock qw __END__ elsif lt qx __FILE__ eq m s __LINE__ exp ne sub __PACKAGE__ for no tr and foreach or unless cmp ge package until continue gt q while CORE if qq xor do le qr y

Language features

Feature	Supported	Example	Token
Binary Literals	✓	# 0b[01]+(_[01]+)*
Integers	✓	# \d+(_\d+)*
Floats	✓	# (?i)(\d(_\d)\.\d+(_\d)\|\d+(_\d)\.\d+(_\d)*)(e[+-]?\d+)?
Hexadecimals	✓	# 0x[0-9A-Fa-f]+(_[0-9A-Fa-f]+)*
Octals	✓	# 0_?[0-7]+(_[0-7]+)*
Conditionals	✓
While Loops	✓
Print() Debugging	✓		print
Range Operator	✓	# https://users.cs.cf.ac.uk/Dave.Marshall/PERL/node38.html @array = (1..10);
Operator Overloading	✓
Multiple Inheritance	✓
File Imports	✓	use Digest::MD5 'md5_hex';
Directives	✓	# In Perl, the keyword "use", which imports modules, can also be used to specify directives, such as use strict; or use utf8; use utf8;
Line Comments	✓	# A comment	#
MultiLine Comments	✓		=begin =cut
Comments	✓	# This is a comment in perl =begin comment This is all part of multiline comment. You can use as many lines as you like These comments will be ignored by the compiler until the next =cut is encountered. =cut
Partial Application	✓	sub first-and-last ( $first, $last ) { say "Name is $first $last"; } my &surname-smith = &first-and-last.assuming( *, 'Smith' ); &surname-smith.( 'Joe' ); # OUTPUT: «Name is Joe Smith␤»
Regular Expression Syntax Sugar	✓	print "Hello World".match(/\w/)
Strings	✓	"hello world"
Semantic Indentation	ϴ

Trending Perl repos on GitHub

repo	stars	description
FlameGraph	8342	Stack trace visualizer
webmin	1077	Powerful and flexible web-based server management control panel
cloc	7923	"cloc counts blank lines comment lines and physical lines of source code in many programming languages."
owasp-modsecurity-crs	1828	OWASP ModSecurity Core Rule Set (CRS) Project (Official Repository)
nikto	3232	Nikto web server scanner

Books about Perl on goodreads

title	author	year	reviews	ratings	rating
Programming Perl	Tom Christiansen	1991	52	2104	4.04
Advanced Perl Programming (Perl Series)	Sriram Srinivasan	1997	1	201	3.93
Effective Perl Programming	Joseph Hall	1997	10	103	4.22
Perl for Dummies	Paul E. Hoffman	1997	5	48	3.42
The Perl CD Bookshelf: Perl in a Nutshell/Programming Perl, 2nd Edition/Perl Cookbook/Advanced Perl Programming/Learning Perl, 2nd Edition/Learning Perl on WIN32 Systems	O'Reilly Media Inc.	1999	0	27	4.11
Programming the Perl DBI	Tim Bunce	2000	3	77	3.47

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