Problem Statement

The task is to demonstrate how to remove the first and last characters from a string. The solution should demonstrate how to obtain the following results:

If the program uses UTF-8 or UTF-16, it must work on any valid Unicode code point, whether in the Basic Multilingual Plane or above it. The program must reference logical characters (code points), not 8-bit code units for UTF-8 or 16-bit code units for UTF-16. Programs for other encodings (such as 8-bit ASCII, or EUC-JP) are not required to handle all Unicode characters.

Let's start with the solution:

[<EntryPoint>]
let main args =
    let s = "一二三四五六七八九十"
    printfn "%A" (s.Substring(1))
    printfn "%A" (s.Substring(0, s.Length - 1))
    printfn "%A" (s.Substring(1, s.Length - 2))
    0