diff --git a/src/features/newFeature.js b/src/features/newFeature.js
new file mode 100644
index 0000000..b6e5789
--- /dev/null
+++ b/src/features/newFeature.js
@@ -0,0 +1,18 @@
+/**
+ * New feature: Calculates the factorial of a given number.
+ * @param {number} n - The input number.
+ * @returns {number} - The factorial of the input number.
+ */
+function factorial(n) {
+  if (n === 0 || n === 1) {
+    return 1;
+  }
+  return n * factorial(n - 1);
+}
+
+module.exports = {
+  factorial,
+};
+
diff --git a/src/app.js b/src/app.js
index 8741c37..91b2e74 100644
--- a/src/app.js
+++ b/src/app.js
@@ -2,6 +2,7 @@
 const express = require('express');
 const bodyParser = require('body-parser');
 const userRoutes = require('./routes/userRoutes');
+const { factorial } = require('./features/newFeature');

 const app = express();
 app.use(bodyParser.json());
@@ -21,6 +22,12 @@
   res.send('Welcome to the API!');
 });

+app.get('/factorial/:number', (req, res) => {
+  const number = parseInt(req.params.number, 10);
+  const result = factorial(number);
+  res.send(`Factorial of ${number} is ${result}`);
+});
+
 // Other routes...

 module.exports = app;