Perl GetStarted

Topiccs

• Install
• Editor
• PreHead
• Hello World
• Comment

Install

Windows

Use Active Perl download.

Install check

Open cmd.exe and type

perl -version

Editor

Komodo Edit download

PreHead

Add perl script header
This is example

#!/usr/local/bin/perl

#!/usr/bin/perl -w

Hello World

Let’s started perl.
Create .pl file

print "Hello\n";

To run this script

perl hello.pl

Comment

Use #. This is line comment

#

Multiline comment

=pod
This is comment yeah!
=cut

Library

CPAN is library warehouse like gem.

undef

It’s Java null, Ruby nil. This is for Perl.

say

like print?, No Java println

say "Hello World!";
my @array = qw(a b c d);
say @array;

die

Close program, when the error happens, this is called.

if(!open LOG, “>>”, ‘logfile’) {
die “Cannot create logfile: $!”;
}

if(@ARGV < 2) { die "Not enough arguments\n"; } [/perl]