diff --git a/app.py b/app.py
new file mode 100644
index 0000000..e11900b
--- /dev/null
+++ b/app.py
@@ -0,0 +1,9 @@
+import math
+
+def calculate_circle_area(radius):
+    """Calculate the area of a circle given its radius."""
+    return math.pi * radius ** 2
+
+# Get input from the user
+print("Welcome to the Circle Area Calculator!")
+radius = float(input("Enter the radius of the circle: "))