refactored the last4Digits variable by invoking the mehtod

Author: Ebrahim-Moqbel

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

@@ -9,4 +9,5 @@ const cardNumber = 4533787178994213;
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
 
 // I predicted the last four digits bit it has to be a string in order to use the method slice and that explain why it wasn't working
-const last4Digits = cardNumber.toString.slice(-4);
+const last4Digits = cardNumber.toString().slice(-4);
+console.log(last4Digits)