solving exercise 3.js

Author: AbdennourHachemi

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

@@ -1,9 +1,21 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+const last4Digits = cardNumber.toString().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
+
+/*
+Prediction : The slice method is used with String data type. here we have cardNumber varible with type Number.
+Running the code will give a TypeError : cardNumber.slice is not a function
+The solution is to convert numbe to string, There are three posibility:
+String(cardNumber)
+cardNumber.toString()
+`${cardNumber}`
+
+*/
+
+console.log(last4Digits);