// In a file, there can be multiple classes but there will be just one public class
// multiple classes in the same Java file can have a main method
// Java does NOT automatically start from the main method of the public class.
// It starts from the class you explicitly tell the JVM to run

public class Hello { // this is a block

    public static void main (String[] args) {
        System.out.println("Hello World!");
        System.out.println(4 + 3);
        System.out.println();
    }
}