Dotdot notationThe following abbreviations are provided for denoting lists, of type [num], whose members form a finite or infinite arithmetic series. Let `a', `b', `c' stand for arbitrary numeric expressions. [a..b] list of numbers from a to b inclusive, interval = 1 [a..] infinite list starting at a and increasing by 1 [a,b..c] arithmetic series, first member a, second member b, last member not greater than c (if b-a non-negative) or not less than c (if b-a negative). [a,b..] infinite series starting at a, interval = (b-a) So the notation [1..10] has as value the list [1,2,3,4,5,6,7,8,9,10]. Here are some more examples nats = [0..] evens = [0,2..] odds_less_than_100 = [1,3..99] neg_odds = [-1,-3..] tenths = [1.0,1.1 .. 2.0]