changed the number to a string in errors 3.js

Author: TzeMingHo

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

@@ -1,6 +1,10 @@
-const cardNumber = 4533787178994213;
+const cardNumber = '4533787178994213';
 const last4Digits = cardNumber.slice(-4);
 
+// A number was not able to be sliced, whereas a string can be sliced
+// So, the error is that cardNumber should be a string, not a number
+console.log(last4Digits);
+
 // The last4Digits variable should store the last 4 digits of cardNumber
 // However, the code isn't working
 // Before running the code, make and explain a prediction about why the code won't work