SWI Prolog中的
http://www.swi-prolog.org/pldoc/man?section=arithpreds
#=
和=:=
有什么区别?我从SWI Prolog中找到了定义,但仍然感到困惑。http://www.swi-prolog.org/pldoc/man?section=arithpreds
![enter image description here](https://istack.dev59.com/KqUSs.webp)
http://www.swi-prolog.org/pldoc/man?section=clpfd-arith-constraints
?- 3=:=3.
true.
?- (3-2) =:= (9-8).
true.
?- 3 #= 3.
true.
?- (3-2) #= (9-8).
true.