diff --git a/16/3 - Digital Sum.py b/16/3 - Digital Sum.py
new file mode 100644
index 0000000..dda5ff4
--- /dev/null
+++ b/16/3 - Digital Sum.py	
@@ -0,0 +1,5 @@
+def digitalSum(n):
+   if n < 10:
+      return n
+   else:
+      return digitalSum(n//10) + n%10