From c850227bee5efd9383d1cb8150500eb304c809fc Mon Sep 17 00:00:00 2001
From: cornbread-eater <146371786+cornbread-eater@users.noreply.github.com>
Date: Tue, 10 Oct 2023 14:07:07 -0700
Subject: [PATCH] Add doctests to primelib.py (#10242)

* Update primelib.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
---
 maths/primelib.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/maths/primelib.py b/maths/primelib.py
index cf01750cf..d5c124255 100644
--- a/maths/primelib.py
+++ b/maths/primelib.py
@@ -574,6 +574,11 @@ def fib(n):
     """
     input: positive integer 'n'
     returns the n-th fibonacci term , indexing by 0
+
+    >>> fib(5)
+    8
+    >>> fib(99)
+    354224848179261915075
     """
 
     # precondition
@@ -589,3 +594,9 @@ def fib(n):
         fib1 = tmp
 
     return ans
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()