public class Main { public static void main(String[] args) { int [] arr = {1,2,3,4,5,6}; System.out.println(findEl(arr,6, arr.length-1)); } public static int findEl(int [] arr,int target, int index) { if (index== arr.length){ return -1; } if(arr[index]==target){ return index; }else{ return findEl(arr, target, index+1); } } }