Why does a void function return a value?

Question

I\'m a programming beginner and I have question regarding a return value from a function.

I´m studying Java.

I have attached code from my book that features a cl

Answer 1

Since arrays are objects, they are passed by their reference (their location in memory), so the changes within sort() to a[] also change a[] declared in main. So a is changed within the function. However, you cannot say

public static void change(int[] a) {
    a = new int[3];
    a = {1, 2};
}

That will not change a itself, because that just makes a new memory location that the parameter a points to, without changing the parameter.