Thread: EvenQ and If in mathmatica

How do i write mathmatica to give me only the even numbers from a list n., so i could use those number for further calculation.

I tried
If[EvenQ[n],1,0]


But the problem here is that it only gives me 1 and 0 out.

ok.. i come so far now..
MK[d_] := Cases[d, x /; EvenQ[d]]

but how do i make able to give me an output which gives me all the even numbers within range[d]