Again, look at the following Java code snippet:

 public static int quiz(int x) { if (x < 10) return x; else return quiz(x/10) + x%10; // NOTE: x/10 is INTEGER DIVISION... e.g 789/10 = 78 not 78.9 // NOTE: x%10 is THE REMAINDER ... e.g. 789%10 = 9 // and 5%10 = 5 (5/10 is 0 with remainder of 5) }