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print defined($count) ? ("=") x (10-$count)
                      : "Undefined count.\n";

print defined($count) ? substr("==========", $count) 
                      : "Undefined count.\n";

print defined($count) ? ("=") x (10-$count) 
                      : "Undefined count.",
...
print defined($count) ? substr("==========", $count) 
                      : "Undefined count.",
      "\n";

print defined($count) ? ("=") x (10-$count) : "Undefined count.", "\n"
+;
print defined($count) ? substr("==========", $count) : "Undefined coun
+t.", "\n";

if (! defined $count) { print "Undefined count.\n" }
else                  { print substr("==========", $count) }

print "You bought $qty item", $qty>1 ? "s" : "", " today!\n";

my $item = $qty > 1 ? "items"
                    : "item";
...
$when = "yesterday" if $purchase_date == $yesterday;

print "You bought $num $item $when!\n";