How to do Recursions in Java

Recursive calls call back the magnetic function in the function, and if there is no stopping condition, it is repeated indefinitely, so be careful.

public static void main(String[] args) {
  int result = sum(1, 4);
  System.out.println(result);
}

public static int sum(int start, int end) {
  if (end > start) { // Stop conditions preventing infinite recursive repetition
    return end + sum(start, end - 1);

  } else {
    return end;
  }

}