perlvar: my ,our

our is global
my is lexical


we use 'package to declare them.
'main' is the default namespace 
globals are package variables
variables relating to that namespace
(not the same as superglobals)


our $name ; # $main::name
package My::Package;
our $name;#$My::Package::name
say $Moose::VERSION;




What is a lexical variable?
Scoped variables
Variables that exist only in a scope!
Available scopes:block, file ,eval
We defind lexical variables with 'my'
(they are saved in a lex pad)




Lexical variable , examples:
{my $exists_only_here}
{my $outer;{my $inner;}}
foreach my $name(@names){
    say $name;
}
say $name; #ERROR




Lexical variables,quiz:
package Example;
my $exvar =30;
package main;
print $exvar;#Display output 30


Answer:
NO ERROR!
my is lexical
package is a namespace, not a scope 
The scope here is the "file scope"
Here is the correct way to do it:
{package Example;my $exvar;}


What is a state variable?
Lexical variables with a twist!
The don't get reinitialized
sub inc{
    state $myvar =0;#default value
    return ++$myvar;
}