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  1. or download this
    use strict; 
    (my $x = 15) && $x;
    
  2. or download this
    use strict; 
    (my $x = 15);$x;
    
  3. or download this
    my $x = 1;
    for (1 .. 5) {
        my $x = $x;
    ...
        print $x;
    }
    print $x;