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# string_list(?String, ?List)

Succeeds if List is a list whose elements are the ascii codes of the characters of String.

String
  String or variable.
List
  List of integers (in the range 0 to 255) and/or variables, or else a variable.

## Description

This predicate performs conversion between a string and a list of the ASCII codes of the characters of the string.

If String is instantiated, unifies List with the list whose elements are the ASCII codes for the elements of the string.

If List is instantiated, unifies String with the string corresponding to this list of ASCII codes.

### Modes and Determinism

- string_list(+, -) is det
- string_list(-, +) is det

### Exceptions

(5) type error
  String is neither a string nor a variable.
(5) type error
  List is neither a list nor a variable.
(6) out of range
  One (or more) elements of List are not integers in the range 0 to 255.
(4) instantiation fault
  Neither String or List are ground (non-coroutine mode only).

## Examples

       Success:
       string_list(S,[65,98,99]).          (gives S="Abc").
       string_list("abc",L).               (gives L=[97,98,99]).
       string_list("abc",[97,A,99]).       (gives A=98).
       string_list(S,[127]).               (gives S="").
       string_list("abc",[97|A]).          (gives A=[98,99]).
       Fail:
       string_list("abc",[98,99,100]).
       Error:
       string_list(S,[A|[128]]).           (Error 4).
       string_list(S,[1|A]).               (Error 4).
       string_list('string',L).            (Error 5).
       string_list(S,"list").              (Error 5).
       string_list('string',[128]).        (Error 5).
       string_list(S,["B"]).               (Error 5).
       string_list(S,[256]).               (Error 6).

## See Also

string_code / 3, string_list / 3, atom_string / 2, char_code / 2, term_string / 2, split_string / 4