Urgent please need help

Question

public double A(int[] data){

return 0;
}
}
my question is how to input array index even number like {2,4,6,8,10,....} in this code with parameter array element n which 100>n>1 btw this is oop question so its dont have main yet

Answer 1

run a loop to get even numbers something like this

for(int i = 0;i<100;i=i+2) {
}

now use i as index.