how can i found out the first 3 element of a list?

[kenguru]

Hi!

I'm making a little test program in Clean, I know that this forum isn't about this programing language but i though if someone knows prolog maybe he worked in clean to
It is possible someway to find out the first x element of a list. For example if we have: [1 2 3 4 5] and x=2 than i would like to have as a result [1 2]

Thank's to those who read my question,
Kenguru

 

[nightshade79]

Hi.. you could try the following...

firstalst(0,_,[]).
firstalst(A,[X|U],[B|Z]) :- A1 is A-1,B is X,firstalst(A1,U,Z).