From d6a6d4d9b428e8a17282ea3240b67e29866558a1 Mon Sep 17 00:00:00 2001 From: Anagha Srikumar Date: Fri, 10 Sep 2021 19:09:23 -0400 Subject: [PATCH] added less than zero case --- fib.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fib.py b/fib.py index 50722c2..f97cfb4 100644 --- a/fib.py +++ b/fib.py @@ -6,6 +6,8 @@ Negative numbers should return None """ def fibonacci(position): + if position < 0: + print("invalid input") if(position == 1 or position == 2): return 1 return fibonacci(position - 1) + fibonacci(position - 2)