F# - This code isn't compiling for me

Posted by stacker on Stack Overflow See other posts from Stack Overflow or by stacker
Published on 2010-06-07T02:26:11Z Indexed on 2010/06/07 2:42 UTC
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This code isn't compiling for me: let countDown = [5L .. -1L .. 0L];;

I have a book that says it should return this:
val countDown : int list = [5L; 4L; 3L; 2L; 1L; 0L]

Compiler Error:

Program.fs(42,24): error FS0010: Unexpected character '-' in expression
>
> let countDown = [5L .. -1L .. 0L];;

  let countDown = [5L .. -1L .. 0L];;
  -----------------------^

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