Problem Statement

Find the character and byte length of a string. This means encodings like UTF-8 need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters. By character, we mean an individual Unicode code point, not a user-visible grapheme containing combining characters. For example, the character length of "møøse" is 5 but the byte length is 7 in UTF-8 and 10 in UTF-16. Non-BMP code points (those between 0x10000 and 0x10FFFF) must also be handled correctly: answers should produce actual character counts in code points, not in code unit counts. Therefore a string like "𝔘𝔫𝔦𝔠𝔬𝔡𝔢" (consisting of the 7 Unicode characters U+1D518 U+1D52B U+1D526 U+1D520 U+1D52C U+1D521 U+1D522) is 7 characters long, not 14 UTF-16 code units; and it is 28 bytes long whether encoded in UTF-8 or in UTF-16.
Please mark your examples with ===Character Length=== or ===Byte Length===. If your language is capable of providing the string length in graphemes, mark those examples with ===Grapheme Length===.
For example, the string "J̲o̲s̲é̲" ("J\x{332}o\x{332}s\x{332}e\x{301}\x{332}") has 4 user-visible graphemes, 9 characters (code points), and 14 bytes when encoded in UTF-8.

Let's start with the solution:

object StringLength extends App {
  val s1 = "møøse"
  val s3 = List("\uD835\uDD18", "\uD835\uDD2B", "\uD835\uDD26",
    "\uD835\uDD20", "\uD835\uDD2C", "\uD835\uDD21", "\uD835\uDD22").mkString
  val s4 = "J\u0332o\u0332s\u0332e\u0301\u0332"

    List(s1, s3, s4).foreach(s => println(
        s"The string: $s, characterlength= ${s.length} UTF8bytes= ${
      s.getBytes("UTF-8").size
    } UTF16bytes= ${s.getBytes("UTF-16LE").size}"))
}