Compare prediction with actual error message and fix the code

Author: Iswanna

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

@@ -1,9 +1,22 @@
-const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+// const cardNumber = 4533787178994213;
+// 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
 // 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
+
+
+// Answer
+// The code will not work because the slice method in javascript only works on a string or an array. 
+// The data type of the value stored in the variable cardNumber is a number and for this reason, the code will return an error.
+// After running the code, it gave an error " TypeError: cardNumber.slice is not a function"
+// My prediction and the error align.
+// To update the code, I will convert the variable cardNumber to a string first then use slice() method after
+
+const cardNumber = 4533787178994213;
+const last4Digits = cardNumber.toString().slice(-4);
+console.log(last4Digits);