diff --git a/main.cc b/main.cc
index 981a175..37f632f 100644
--- a/main.cc
+++ b/main.cc
@@ -1,6 +1,11 @@
 #include <iostream>
 
+auto get_fib_of(int n) -> int {
+  return n < 2 ? 1 : get_fib_of(n - 1) + get_fib_of(n - 2);
+}
+
 auto main() -> int {
   std::cout << "hello, world" << std::endl;
+  std::cout << "10th fib is: " << get_fib_of(10) << std::endl;
   return 0;
 }