You have to tell Perl which packages you intend to use, with the use command: : Package « Language Basics « Perl






  1. Perl
  2. Language Basics
  3. Package

You have to tell Perl which packages you intend to use, with the use command:

  

#  use packagename;

#  For example:
#  use File::Copy;


#!/usr/bin/perl -w

use File::Copy;

$input  = "text.txt";

$output = "text1.txt";

copy($input, $output) or die 
  "Can't copy $input to $output due to $!.";








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1.A package is a separate name space for variables to reside in.
2.Contents of the symbol table for the main package.
3.Default package is main
4.Define variables with the same name in different package
5.Module::get_scalar()
6.Out value scope
7.Package declarations and subroutine
8.Reference variable by package name
9.Requires the package created above and calls the subroutine declared within it:
10.Scope change
11.Switches between packages.
12.This code should be stored in the file Mymodule.pm.
13.Using the package keyword to change the package context
14.Your package