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###########################################################
#
...
#   Its cool.
#
###########################################################

#
#   This is a less intrusive way of setting off a long
...
#   code block.  I also usually include a blank line at
#   the end for spacing.
#

use strict; #always
my $this_is_ a_variable_name #does this comment stand out?
my $x; #how about this one?
my $what_is_going_on #where will the next comment be?

use strict;                  # always
my $this_is_a_variable_name; # does this comment stand out?
my $x;                       # how about this one?
my $what_is_going_on;        # where will the next comment be?

$x++;  # increment $x

$x++;  # keep track of how many users have logged in