Packages

Packages allow us to split classes and interfaces into separate namespaces. A package may contain any number of classes and interfaces. Any file may begin with a package declaration:

    package com.packt.myproject 
    class Foo 
    fun bar(): String = "bar" 

The package name is used to give us the fully qualified name (FQN) for a class, object, interface, or function. In the preceding example, the Foo class has the fully qualified name of com.packt.myproject.Foo, and the top-level bar function has the fully qualified name of com.packt.myproject.bar.