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

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.

CodePudding user response：

Question is about updating original array values, then you have to use normal for loop so that each index values can be updated:

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

  bucky = change(bucky);
  for(int b:bucky) {
        System.out.println(b);
    }
  }

  public static void change(int x[]){
    for (int i = 0; i < x.length; i  ) {
        x[i]=x[i] 5;
    }
    return x;
  }
}