my $x = 1;
my $b = 'A';
$x++; # $x now equals 2.
$b++; # $b now equals 'B'.
my @numbers = (1..10);
  # @numbers now contains 1, 2, 3, .. 10.
my @letters = ('A'..'Z');
  # @letters now contains A, B, C, .. Z. 

my @more = ('A'..'AZ');
  # @more now contains A, B, .. Z, AA, AB, ..AZ.