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  1. or download this
    use strict;
    use warnings;
    ...
    print "\ni is ".$i++;
    $part2->();
    print "\ni is $i";
    
  2. or download this
     % test1.pl
    i is 1
    now its 2
    i is 2
    
  3. or download this
    use strict;
    use warnings;
    ...
    print "\ni is ".$i++;
    $part2->();
    print "\ni is $i";
    
  4. or download this
     % test1.pl
    i is 1
    i is 2