@@ -1,4 +1,4 @@
-const cardNumber = 4533787178994213;
+const cardNumber = "4533787178994213";
 const last4Digits = cardNumber.slice(-4);
 
 // The last4Digits variable should store the last 4 digits of cardNumber
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-const cardNumber = 4533787178994213;`
	`1`	`+const cardNumber = "4533787178994213";`
`2`	`2`	`const last4Digits = cardNumber.slice(-4);`
`3`	`3`
`4`	`4`	`// The last4Digits variable should store the last 4 digits of cardNumber`