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_D_o_t_d_o_t_ _n_o_t_a_t_i_o_n
The 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]
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