PR comment fixed

Author: sameersayani

demo.js

@@ -23,15 +23,15 @@ async function fetchData(url) {
     }
 }
 
-//function to convert any currency to INR using a fixed exchange ratefunction
+//function to convert any currency to INR using a fixed exchange rate function
 function convertToINR(amount, currency) {
     const exchangeRates = {
         USD: 74.85,
         EUR: 88.50,
         GBP: 103.20,
         JPY: 0.68
     };
-    if (exchangeRates[currency]) {
+    if (Object.hasOwn(exchangeRates, currency)) {
         return amount * exchangeRates[currency];
     } else {        
         throw new Error('Unsupported currency');