Shell Programming and Scripting

can someone tell me how below package command worked?

I understand how global1.pl works.. but i don't see how global3.pl is working..
Is package Fred command having first output look into $main:name???

[root@localhost perl]# cat global3.pl
#!/usr/bin/perl -w

#use strict;

$main::name = "Your name Here";
$Fred::name = "Fred Flintstone";
$Barney::name = "Barney Rubble";

print "\$name in package main is $name\n";
package Fred;
print "\$name in package Fred is $name\n";
package Barney;
print "\$name in package Barney is $name\n";
package main;
[root@localhost perl]# cat global1.pl
#!/usr/bin/perl -w

#use strict;

$main::name = "Your name Here";
$Fred::name = "Fred Flintstone";
$Barney::name = "Barney Rubble";

print "\$name in package main is $name\n";
print "\$name in package Fred is $Fred::name\n";
print "\$name in package Barney is $Barney::name\n";
[root@localhost perl]# ./global3.pl
$name in package main is Your name Here
$name in package Fred is Fred Flintstone
$name in package Barney is Barney Rubble
[root@localhost perl]# ./global1.pl
$name in package main is Your name Here
$name in package Fred is Fred Flintstone
$name in package Barney is Barney Rubble

The "package" statement changes the default package used to resolve any names without explicit package qualification.

If you uncomment the "use strict" pragma, the interpreter will give you a warning.

For further details, please read the perlmod manpage:
http://perldoc.perl.org/perlmod.html...ariable-global