fix: convert cardNumber to string before slicing last 4 digits

Author: Grajales-K

Sprint-1/errors/3.js

@@ -1,9 +1,20 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+const numberString = cardNumber.toString();
+const last4Digits = numberString.slice(-4);
+const num = Number(last4Digits);
+
+console.log(num);
 
 // 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
 // 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
+
+
+
+// explanation: to see the numbers correctly we need to convert the cardNumber to a string
+//  first before slicing the last 4 digits. The original code was trying to use slice 
+//  a number, which is not valid. By converting it to a string first, 
+//  we can then slice the last 4 characters correctly. Then we convert it back to a number.