adding the fibonacci series to the Recursion package

src/main/java/com/thealgorithms/Recursion/FibonacciSeries.java

@@ -0,0 +1,24 @@
+package com.thealgorithms.Recursion;
+
+/*
+    The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones,
+    starting with 0 and 1.
+       NUMBER    0 1 2 3 4 5 6 7  8  9  10 ...
+       FIBONACCI 0 1 1 2 3 5 8 13 21 34 55 ...
+*/
+
+public class FibonacciSeries {
+
+    static int fib(int n) {
+        if (n == 0 || n ==1)
+            return n;
+        else
+            return fib(n - 1) + fib(n - 2);
+    }
+
+    public static void main(String[] args) {
+        System.out.println("Fibonacci = " + fib(1)); // Fibonacci = 1
+        System.out.println("Fibonacci = " + fib(0)); // Fibonacci = 0
+        System.out.println("Fibonacci = " + fib(14)); // Fibonacci = 377
+    }
+}