Evaluate vertical spacing in this Java code example:

int personAge; 
String personName; 
Scanner sc = new Scanner(System.in);
System.out.println("Tell me your name:");
personName = sc.nextLine();
System.out.println("Tell me your age:");
personAge = sc.nextInt();
if (personAge > 18) 
    System.out.println("You are an adult " + personName);

How does vertical spacing contribute to the code's readability?