ordinal()
Instance Public methods
Ordinal returns the suffix used to denote the position in an ordered
sequence such as 1st, 2nd, 3rd, 4th.
1.ordinal # => "st"
2.ordinal # => "nd"
1002.ordinal # => "nd"
1003.ordinal # => "rd"
-11.ordinal # => "th"
-1001.ordinal # => "st"