Why does [1..5] in Rascal return [1,2,3,4]?

Question

I expect it to return [1,2,3,4,5] as in Haskell.

Answer 1

Short answer: the left index is inclusive and the right is exclusive by design.

Long answer: the reason for the short answer is that lists are zero indexed, and we noticed everybody having to write (or forgetting to write) [0..size(myList) - 1]. Now we can write [0..size(myList)] instead. It is not like Haskell, but its like Python.