diff --git a/.replit b/.replit
new file mode 100644
index 0000000..2aff877
--- /dev/null
+++ b/.replit
@@ -0,0 +1,2 @@
+language = "bash"
+run = ""
\ No newline at end of file
diff --git a/main.py b/main.py
index 2805a62..9fbc16a 100644
--- a/main.py
+++ b/main.py
@@ -2,3 +2,7 @@
 
 def area(radius):
 	return PI * radius ** 2
+
+def circumference(diameter):
+	return PI * diameter
+