1)Scala Introduction

Scala Introduction:

what is Scala programming language?
Scala is both a Functional programming and Object Oriented programming language that runs on the JVM as well as with lightweight syntax, safe and performant , with strong static typing.

Note:
It was designed by Martin Odersky in 2004 and the language runs on the Java Virtual Machine (JVM).

Scala functional programming features:

• Immutations
• Composing functions - Functions that can be freely mixed in with other functions to compose even more functions.
• Higher Order functions - in Scala you can create higher order functions which are functions that take other functions as parameters. 

• Pattern Matching
• Asynchronous and parallel programming
• Dependency Injection - Scala brings new meaning to dependency injection as first class citizen using features such as traits and implicits. 
• Extensible language
• Mixing Java code with Scala

The Scala ecosystem:

Will be more extensible :)