Question

Please complete in Prolog, thank you.  

Write the following statement as prolog clauses (one fact and one rule):
“weather is hot. if weather is hot, everyone like it.”

So, all following queries will return true
likes (me, weather). likes (jane, weather). likes (john, weather). % etc.

Do these different queries produce the same result in prolog? Why?
?- N is -(+(5,6),4). ?- N is (5+6)-4.

Answer 1

The prolog code for the 1st part (“weather is hot. if weather is hot, everyone like it”) is as follows -

Code:

% weather is hot
is_hot(weather).

% anyone will like the weather if it is hot
likes(_, W):-
is_hot(W).

Run:

Part 2 -

Do these different queries produce the same result in prolog? Why?
?- N is -(+(5,6),4). ?- N is (5+6)-4.

Run:

Explanation:

Both the queries produce the same result, because both are mathematical expressions denoting the same thing.

N is -(+(5,6),4). - is prefix notation where the operator comes before the operands.

N is (5+6)-4. - is infix notation which is the common form for a mathematical expression.