how to extract pin_code,phone_number,year from text file using regular expressions in perl

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In CPAN module, name an instance you use.

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How do you open a file for writing?

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How to renaming a file in perl programming?

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How to concatenate strings with perl?

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What is use of ‘->’ symbol?

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package MYCALC; use Exporter; our @EXPORT = (); our @ISA = qw(Exporter); our @EXPORT_OK = qw(addition multi); our %EXPORT_TAGS = (DEFAULT => [qw(&addition)],Both => [qw(&addition & +multi)]); sub addition { return $_[0] + $_[1]; } sub multi { return $_[0] * $_[1]; } 1; Program: use strict; use warnings; my @list = qw (2 2); use Module qw(:DEFAULT); print addition(@list),"\n"; Above coding is my module MYCALC and the program which using this module, I have not exported any function using @EXPORT, but I have used the DEFAULT in %EXPORT_TAGS with the function addition, when I call this function from the main it says the error as,

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What is the use of -n and -p options?

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what are the three groups involved in information sharing?

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Which guidelines by Perl modules must be followed?

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Can inheritance be used in perl?

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Perl regular expressions are greedy" what does this mean?

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