completed task in Sprint-1/2-mandatory-errors/3.js

Author: i786m

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

@@ -1,9 +1,21 @@
-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
+
+//The code will not work because it tries to use a string method on a number
+
 // 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?
+// Consider: Why does it give this error? Is this what I predicted? If not, what's different? 
+
+// error is  TypeError: cardNumber.slice is not a function which is what I expected
+
+
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+// by concatenating an empty string the code works as expected
+const cardNumber = "" + 4533787178994213;
+const last4Digits = cardNumber.slice(-4);
+console.log(last4Digits); // should log '4213'
+