Hello Milind,
I am trying to learn PROLOG, and saw this code.
But in my case,
I can see the following output.
can you please elaborate the behavior.
[trace] [4] 257 ?- start.
Call: (30) start ? creep
Call: (31) sum ? creep
Exit: (31) sum ? creep
Call: (31) nl ? creep
Exit: (31) nl ? creep
Exit: (30) start ? creep
true .
While my code is as follow.
%predicates
start.
sum.
%clauses
start :- sum, nl.
sum :-
write("X = "),
readreal(X),
write("Y = "),
readreal(Y),
S = X + Y,
write("SUM is = "),
write(S). |