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Prolog中有什么东西可以像for循环那样工作吗？

I have just started prolog and was wondering if we can implement conditional statements like(if.else)in Prolog also and if so how?? Can someone implement this code in Prolog just for an example-

if(a==2)
 print("A is 2");
if(a==3)
 print("A is 3");
else
 print("HAhahahahaah");

Ok so I am doing this after Sergey Dymchenko answer.

Test(A) :-read(A),
 ( A =:= 2 ->
    write('A is 2')
 ;
    ( A =:= 3 ->
        write('A is 3')
    ;
        write('HAhahahahaah')
    )
 ).

This is giving right answer …