A Wolfram Language string is a sequence of characters. The language and the standard library treat strings as fundamental data types with built-in support for Unicode.

```wolfram
(* s is a String assigned a literal value
   representing the word "hello" in the Thai language. *)
s = "สวัสดี"

(* StringLength gives the number of characters in the string *)
Print["Len: ", StringLength[s]]

(* We can use Characters to convert the string to a list of characters,
   then map them to their integer representations *)
Print[IntegerString[ToCharacterCode[s], 16]]

(* StringLength gives us the number of characters (equivalent to runes in Go) *)
Print["Character count: ", StringLength[s]]

(* We can use MapIndexed to iterate over each character with its position *)
MapIndexed[
  (Print[
    StringTemplate["U+````` '``' starts at ``"][
      IntegerString[ToCharacterCode[#1][[1]], 16, 4],
      #1,
      First[#2] - 1
    ]
  ]) &,
  Characters[s]
]

(* We can achieve a similar iteration using StringTake and StringDrop *)
Print["\nUsing StringTake and StringDrop"]
i = 1;
While[i <= StringLength[s],
  char = StringTake[s, {i}];
  Print[
    StringTemplate["U+````` '``' starts at ``"][
      IntegerString[ToCharacterCode[char][[1]], 16, 4],
      char,
      i - 1
    ]
  ];
  examineCharacter[char];
  i++
]

(* This demonstrates passing a character to a function *)
examineCharacter[char_] := Module[{},
  If[char == "t",
    Print["found tee"],
    If[char == "ส",
      Print["found so sua"]
    ]
  ]
]