Find a MIN/MAX

[KMK2009]

Hello,

Is there ANY way in ProLog to find a min/max for unknown amount of elements?

 

[joel76]

Yes.

 

[KMK2009]

I saw some examples like:
is(A), not (is(B), A > B).
is it there another way?

 

[joel76]

Is there ANY way in ProLog to find a min/max for unknown amount of elements?

I supposed you were speaking of that kind of things :
minmax([10,2,....., 1000,20], Min, Max) ==>
Min = 2
Max = 1000

 

[KMK2009]

nope, without using [], just simple atomic statement and backtracking logic

 

[nn987]

for simple atomic statement

max(X,Y,X):-X >= Y.
max(X,Y,Y):-X < Y.

And for one list of numbers.

maxLis( [] ).
maxList( [E],E ).
maxList( [E,E2 | T],L ):-maxList( [E2 | T],L1 ),max(L1,E,L).