Recursive Array Search

What is printed when the following code is executed?

public class FirstIndex {
public static int findFirstIndex(int[] arr, int index, int target) {
if(index == arr.length) return -1;
if(arr[index] == target) return index;
return findFirstIndex(arr, index + 1, target);
}
public static void main(String[] args) {
int[] arr = {5, 7, 9, 7, 3};
System.out.println(findFirstIndex(arr, 0, 7));
}
}