null

There is a special value called null which is assignable to most types.

void main() {
    String name = null;
    int[] numbers = null;

    System.out.println(name);
    System.out.println(numbers);
}

The only types which null cannot be assigned to are int, double, char, and boolean.¹

void main() {
    // Will not work
    int x = null;
}