Codes is the list consisting of the codes comprising the printed representation of Constant.
Initially, either Constant must be instantiated to a number or an atom, or Codes must be instantiated to a proper codes.
If Constant is initially instantiated to an atom or number, Codes will be unified with the codes that make up its printed representation.
If Constant is uninstantiated and Codes is initially instantiated to a codes that corresponds to the correct syntax of a number (either integer or float), Constant will be bound to that number; otherwise Constant will be instantiated to an atom containing exactly those characters.
There are atoms for which
) is true, but which will not be
name/2 is called with Const
uninstantiated. One such atom is the atom
'1976'. It is recommended that new programs use
number_codes/2, as these predicates
do not have this inconsistency.
| ?- name(foo, L). L = [102,111,111]
| ?- name('Foo', L). L = [70,111,111]
| ?- name(431, L). L = [52,51,49]
| ?- name(X, [102,111,111]). X = foo
| ?- name(X, [52,51,49]). X = 431
| ?- name(X, "15.0e+12"). X = 1.5e+13