Fix last4Digits assignment by converting cardNumber to string and update comments for clarity

Author: MohammedNaru

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

@@ -1,9 +1,18 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+//const last4Digits = cardNumber.slice(-4);
 
 // 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
+// CardNumber is not a funtion so it does not have the method slice.
+
 // Then run the code and see what error it gives.
+// TypeError: cardNumber.slice is not a function
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
+//this is what I predicted because slice is a method for strings and arrays, not numbers.
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+
+const last4DigitsCorrected = cardNumber.toString().slice(-4);
+
+console.log(last4DigitsCorrected); // Should output: 4213