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Summing numbers

Summing numbers

Build a list with the to method:

1.to(10)
// res0: Range.Inclusive = Range.Inclusive(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

Build a list with the until method:

1.until(10)
// res1: Range = Range(1, 2, 3, 4, 5, 6, 7, 8, 9)

Use map to transform the list.