What are traits in Scala and how are they different from classes and interfaces?

In Scala, traits are a fundamental construct that allows developers to define reusable units of behavior that can be mixed into classes. Traits are similar to interfaces in other languages but offer more flexibility and power due to their ability to contain implementation code. Traits play a crucial role in enabling code reuse, composition, and multiple inheritance in Scala. While classes and interfaces serve specific purposes, traits provide a unique combination of features that differentiate them from both classes and interfaces. Here are the key aspects and differences between traits, classes, and interfaces in Scala: 1. Definition and Usage: * Classes: Classes in Scala are used to define blueprints for objects. They encapsulate both behavior (methods) and state (fields). Instances of classes can be created using the `new` keyword, and a class can be instantiated multiple times. * Interfaces: Interfaces in Scala define contracts that specify the methods that implementing classes must provide. Interfaces can only declare abstract methods, and a class can implement multiple interfaces. Interfaces are primarily used for achieving abstraction and defining common behavior across multiple classes. * Traits: Traits in Scala define units of behavior that can be mixed into classes us....