I’ve edited your post for readability. When you enter a code block into the forum, remember to precede it with a line of three backticks and follow it with a line of three backticks to make easier to read. See this post to find the backtick on your keyboard.
The original code for the challenge is as follows:
var firstNameLength = 0;
var firstName = "Ada";
firstNameLength = firstName.length;
var lastNameLength = 0;
var lastName = "Lovelace";
// Only change code below this line.
lastNameLength = lastName;
You only need to change the last line of code. Don’t change any of the other lines.