Menu
A Prolog program consists of predicate definitions. A predicate denotes a property or relationship between objects. Definitions consist of clauses. A clause has a head and a body (Rule) or just a head (Fact). A head consists of a predicate name and arguments.
Prolog uses a stack to keep track of the levels of predicate calls. In the case of a recursive predicate, the stack grows at each recursive call. In this example, with its complex arguments, the stack could easily be consumed in a shortperiod of time by the recursive control structure.
Prolog in Artificial Intelligence The not predicate is used to negate some statement, which means, when a statement is true, then not(statement) will be false, otherwise if the statement is false, then not(statement) will be true. If X and Y match, then different(X,Y) fails, Otherwise different(X,Y) succeeds.
Goals relating to user-defined predicates are evaluated by examining the database of rules and facts loaded by the user. Prolog attempts to satisfy a goal by matching it with the heads of clauses in the database, working from top to bottom.
Have a curiosity related to Prolog predicate control.
Supposedly I have a predicate f(A,X) and g(B).
f(A,X):- a,b,c, g(X).
g(B):- true.
a - returns true
b - returns true.
c - returns false.
where a,b and c are random predicates.
How can I continue to evaluate g(X) in the predicate f(A,X) if c returns false?
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With