You can find the length of a `String` value by writing `.length` after the string variable or string literal.
`"Alan Peter".length; // 10`
For example, if we created a variable `var firstName = "Charles"`, we could find out how long the string `"Charles"` is by using the `firstName.length` property.
# --instructions--
Use the `.length` property to count the number of characters in the `lastName` variable and assign it to `lastNameLength`.
# --hints--
You should not change the variable declarations in the `// Setup` section.