char_code/2

Availability:built-in

[ISO]char_code(?Atom, ?Code)

Convert between a single character (an atom of length 1), and its character code (an integer denoting the corresponding character). The predicate alternatively accepts an SWI-Prolog string of length 1 at Atom place.

Character codes accepted by atom_codes/2, atom_chars/2 and char_code/2 must be valid Unicode code points. Lone UTF-16 surrogate code points (0xD800...0xDFFF) are rejected with a type_error(character_code, Code). See section 2.18.