making changes based on code review

src/fibRoute.ts

@@ -1,14 +1,17 @@
-import { Request, Response } from "express";
+import { Request, Response } from 'express';
+import fibonacci from './fib';
 
+// Endpoint for querying the fibonacci numbers
 export default (req: Request, res: Response) => {
-  const { num } = req.params as { num: string }; // Explicitly typing `num` as a string
+const { num } = req.params as { num: string };
 
-  const fibN = fibonacci(parseInt(num));
-  let result = `fibonacci(${num}) is ${fibN}`;
+const parsedNum: number = parseInt(num, 10);
+const fibN: number = fibonacci(parsedNum);
+let result = fibonacci(${num}) is ${fibN};
 
-  if (fibN < 0) {
-    result = `fibonacci(${num}) is undefined`;
-  }
+if (fibN < 0) {
+result = fibonacci(${num}) is undefined;
+}
 
-  res.send(result);
-};
+res.send(result);
+};