task 3.js explained and completed

Author: MattCarolus10

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

@@ -5,5 +5,4 @@ console.log(last4Digits)
 // The variable cardNumber is not a string and the slice() function works with strings or array
 
 // Consider: Why does it give this error? 
-// It gave that error brcause the slice() tool are not applicable to numbers.     
-// I wasn't sure what error to expect because I'm just starting to learn the slice() tool
+// It gave that error "TypeError: cardNumber.slice is not a function" brcause the slice() function tool are not applicable to numbers.