?CodeList)CodeList is a list of character codes representing the same
text as Atomic. Each of the arguments may be a variable, but
- When CodeList describes an integer or floating point
Atomic is a variable, Atomic will be unified with
the numeric value described by CodeList (e.g.,
"300"), 400 is N + 100 succeeds).
- If CodeList is not a representation of a number,
Atomic will be unified with the atom with the name given by
the character code list.
- If Atomic is an atom or number, the unquoted print
representation of it as a character code list is unified with CodeList.
This predicate is part of the Edinburgh tradition. It should be
considered deprecated although, given its long tradition, it is
unlikely to be removed from the system. It still has some value for
converting input to a number or an atom (depending on the syntax). New
code should consider the ISO predicates atom_codes/2, number_codes/2
or the SWI-Prolog predicate atom_number/2.