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  1. or download this
    $value= "global";

do { print "Inside block: $value\n" }
   for (my $value= 5;  $value < 7;  ++$value);
  2. or download this
    $_= 1;

do { print "Inside block: $_\n" }
   for (5..7);
  3. or download this
    do { print "Inside block: $value\n" }
   for my $value (5..7);