fixed typeError by changing cardNumberfrom a number to a string

Author: marscancode

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

@@ -1,15 +1,15 @@
-const cardNumber = 4533787178994213;
+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
 
-// I predict that it'll throw a syntax error as its not wrapped in "" so it's  registering as a number and but it needs to be a string so the .slice() method can register each individual number in last4Digits?  
+// I predict that it'll throw a syntax error as its not wrapped in "" so it's  registering as a number and but it needs to be a string so the .slice() method can register each individual number in last4Digits?
 //console.log(last4Digits)
 //output: TypeError: cardNumber.slice is not a function
-//it's slightly different to what i expected as i thought it was solely about not using the right syntax but it's a type error which after research type error is  about not being able to perform a certain operation on a value so here the slice method wouldn't work as .slice() method can only work on strings and arrays so i need to turn cardNumber into a string before the slice() method can work on it. so whilst i was right that it needed "" my reason for why was wrong. 
+//it's slightly different to what i expected as i thought it was solely about not using the right syntax but it's a type error which after research type error is  about not being able to perform a certain operation on a value so here the slice method wouldn't work as .slice() method can only work on strings and arrays so i need to turn cardNumber into a string before the slice() method can work on it. so whilst i was right that it needed "" my reason for why was wrong.
+console.log(last4Digits);