if else if else clause in prolog similar to C/C++

Question

In c language i have something like :

if(cond1)
{}
else if(cond2)
{}
else
{}

how is this possible in Prolog?

Answer 1

if_then_else(Condition,Then,Else) :- Condition, !, Then.
if_then_else(Condition,Then,Else) :- Else.

For example:

max(X,Y,Max) :- if_then_else(X>Y,Max=X,Max=Y).

?- max(4,7,A).
A = 7
?- max(8,2,A).
A = 8