如何在前置条件中迭代数组？

var arr = [1, 2, 3, 4, 5];
for (var i = 0; i < arr.length; i++) {
    console.log(arr[i]);
}

var arr = [1, 2, 3, 4, 5];
arr.forEach(function(element) {
    console.log(element);
});

arr = [1, 2, 3, 4, 5]
iter_arr = iter(arr)
for element in iter_arr:
    print(element)

public static void iterateArray(int[] arr, int index) {
    if (index >= arr.length) {
        return;
    }
    System.out.println(arr[index]);
    iterateArray(arr, index + 1);
}

public static void main(String[] args) {
    int[] arr = {1, 2, 3, 4, 5};
    iterateArray(arr, 0);
}