It's basically just a shortcut for the package variable $main::var as demonstrated by: 

package Foo;
use strict;
$::foo = "yayayaya";
                                                                      
+          
print $main::foo;

[download]

In your example the unqualified$var might be a different variable if it a lexical variable.

/J\

In reply to Re: What does $::var means by gellyfish
in thread What does $::var means by kprasanna_79

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