added print function for last4Digits

Author: RaeesStevens

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

@@ -7,3 +7,6 @@ const last4Digits = cardNumber.slice(-4);
 // Then run the code and see what error it gives.
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+// Card Number is declared as a number and not a string, so slice won't work.
+console.log(last4Digits);