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  1. or download this
    my $var = 2;
    sub x{ print $var; }
    ...
    $var = 3;
    
    x(); # prints 3
    
  2. or download this
    {
        my $var = 2;
    ...
    my $var = 3;
    
    x(); ## Still prints 2; the $var above is a different $var.