edited answer to 2-mandatory errors

Author: TaliaKucuk

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

@@ -1,7 +1,6 @@
-const cardNumber = "4533787178994213";
-const last4Digits = cardNumber.slice(-4);
+const cardNumber = 4533787178994213;
+const last4Digits = cardNumber.toString().slice(-4);
 
-console.log(last4Digits);
 // I thought the issue might be something to do with the number given (-4) but it's actually the fact that cardNumber.slice is not a function.
 // Slice is not a function for numbers - it's for strings
-// To solve this we can turn the card number into a string
+// To solve this we can turn the card number into a string by using toString() - this converts the number to a string temporarily rather than changing the card number to a string itself.