RosettaCodeData/Task/Nth/F-Sharp/nth.fs

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open System
let ordinalsuffix n =
let suffixstrings = [|"th"; "st"; "nd"; "rd"|]
let (d, r) = Math.DivRem(n, 10)
n.ToString() + suffixstrings.[ if r < 4 && (d &&& 1) = 0 then r else 0 ]
[<EntryPoint>]
let main argv =
let show = (Seq.iter (ordinalsuffix >> (printf " %s"))) >> (Console.WriteLine)
[0..25] |> show
[250..265] |> show
[1000..1025] |> show
0