Add some cool queue, stacks, strings, math, bit manipulation examples (#35)

math_and_logic/fibonacci.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
+def fibonacci(n):
+    """ Calculate the nth Fibonacci number """
+    if n == 0 or n == 1:
+        return n
+    return fibonacci(n - 1) + fibonacci(n - 2)
+
+
+if __name__ == '__main__':
+
+    print('Testing fibonacci')
+    n = 10
+    print(f'Fibonacci of {n}: {fibonacci(n)}')