Passing array to a function and using that array in an Enhanced for loop

When I pass the array "bucky" to the change function and in the change function if I use an enhanced for loop, the variable counter gives the error "The value of the local variable counter is not used"

But if I put the body of the for loop in an System.out.println(counter+=5) the error does not appear

class apples{
 public static void main(String[] args) {
  int bucky[]={3,4,5,6,7};

  change(bucky);
  }

  public static void change(int x[]){
    for(int counter: x){
     counter+=5;
    }
  }
}

Why does this code give the error I mentioned above since I’m using the counter variable in the enhanced for loop?

Edit – my objective is to change values of the array inside the "change" function and return it back to main.

>Solution :

The variable counter is not used. Yes, you use it in the loop but you’re not returning it or utilizing its value for other operations.

If you put it inside a System.out.println then you are using it.