464: Mainline

The version of the rabbits method shown in the program in Segment 452 contains an if–else statement:

public class Demonstrate { 
 public static int rabbits (int n) { 
  if (n == 0 || n == 1) { 
   return 1; 
  } 
  else { 
   return rabbits(n - 1) + rabbits(n - 2); 
  } 
 } 
} 

If you wish, you can rewrite the program without the || operator, handling separately cases of 0 or 1 rabbit:

public class Demonstrate { 
 public static int rabbits (int n) { 
  if (n == 0) {return 1;} 
  else if (n == 1) {return 1;} 
  else {return rabbits(n - 1) + rabbits(n - 2);} 
 } 
}