// https://sharplab.io/#v2:DYLgZgzgNAJiDUAfYBTALgAhgewPpgEsVgYMwBbTANwwF4BYAKAxYwAcAnAgOzTG7KUMVJkwDaAHgCivDgE8ACth5oAfAF0mqTOQCGPDLjpNWWPIWKkARAFICVjFYASxYNgwB1bBxJWTrAGU5CDQUcgA6AGFsbghsVHCAJRRdGAAZHhQACgBKDERVDAIAc25vFH8WAAYMAHpajA50AFcOAV0BFRRilA4MFAAPAkwAY2wYCsYgA==

​

​

let getResult arg =

  let rand = new System.Random()

  let v = (arg * rand.NextDouble()) - 1.0

  v

[<Literal>]

let fmt = "Random Result: %f"

​

let do_field fmt v =

    printfn fmt v

​

[<EntryPoint>]

let main _ =

  let v = getResult 2.0

  do_field "Random Result: %f" v

  // do_field "%i" "Hello World"

  System.Console.ReadLine() |> ignore

  0 // return an integer exit code

​