From 7b4e6f23b277ed7df3a14c412d3ea36790849939 Mon Sep 17 00:00:00 2001
From: percy07 <56677891+percy07@users.noreply.github.com>
Date: Tue, 29 Oct 2019 15:06:53 +0530
Subject: [PATCH] Update greatest_common_divisor.py

Add Doctests.
---
 maths/greatest_common_divisor.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/maths/greatest_common_divisor.py b/maths/greatest_common_divisor.py
index 07dddab9aeff..21c427d5b227 100644
--- a/maths/greatest_common_divisor.py
+++ b/maths/greatest_common_divisor.py
@@ -10,6 +10,16 @@ def greatest_common_divisor(a, b):
     Calculate Greatest Common Divisor (GCD).
     >>> greatest_common_divisor(24, 40)
     8
+    >>> greatest_common_divisor(1, 1)
+    1
+    >>> greatest_common_divisor(1, 800)
+    1
+    >>> greatest_common_divisor(11, 37)
+    1
+    >>> greatest_common_divisor(3, 5)
+    1
+    >>> greatest_common_divisor(16, 4)
+    4
     """
     return b if a == 0 else greatest_common_divisor(b % a, a)