Perl Arguments and Env variables

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@ARGV and %ENV

The built-in array @ARGV contains the command line arguments for a Perl program. The following run of the Perl program critic.pl will have the ARGV array ("-poetry", "poem.txt"). unix% perl critic.pl -poetry poem.txt

%ENV contains the environment variables of the context that launched the Perl program.

@ARGV and %ENV make the most sense in a Unix environment. So for example you have a script like test.pl

#!/usr/bin/perl
use strict;
my $column=$ARGV[0];
my $database=$ARGV[1];
------run the program now---
$./test.pl ssn employees

in above example we are passing two values as commandline arguments. so $column will have "ssn" and $database will have "employees".
Note: Pass values in quoutes if values have spaces.