used .toString to cast the nuber date type to string and assign the value to cardNumberString

Author: Tobias-Amaechina

Sprint-1/2-mandatory-errors/3.js

@@ -1,5 +1,6 @@
 const cardNumber = 4533787178994213;
 //console.log(typeof cardNumber);
+const cardNumberString = cardNumber.toString();
 
 const last4Digits = cardNumber.slice(-4);
 console.log(last4Digits); // Output: "4213"