Explain the use of Go's concurrent programming techniques for building and executing Go programs in parallel and concurrently for various purposes and scenarios?

Go is often described as a "pragmatic" language, as it incorporates elements of both object-oriented programming (OOP) and functional programming (FP).

Go supports OOP concepts such as encapsulation, inheritance, and polymorphism. Encapsulation allows data to be hidden from the outside world and accessed only through public methods. Inheritance allows for code reuse through the creation of subclasses that inherit properties and behaviors from a parent class. Polymorphism allows for flexibility in the behavior of objects, allowing them to be treated as instances of their own class or as instances of a parent class. Go implements these concepts through the use of interfaces, which provide a way to define a set of methods that a type must implement.

Go also supports FP concepts such as higher-order functions, closures, and immutability. Higher-order functions are functions that take other functions as arguments or return functions as their results. Closures are functions that capture and retain the environment in which they are defined. Immutability is the concept of creating values that cannot be changed once they are created. Go implements these concepts through the use of functions as first-class citizens, allowing them to be passed as arguments and returned as results, and through the use of pointers and structs to create immutable values.

In summary, Go's OOP concepts allow for building complex and reusable code structures, while its FP concepts allow for building efficient and scalable algorithms. The choice between using OOP or FP depends on the specific requirements and constraints of the problem being solved.