Book Image

Learning Scala Programming

By : Vikash Sharma
Book Image

Learning Scala Programming

By: Vikash Sharma

Overview of this book

Scala is a general-purpose programming language that supports both functional and object-oriented programming paradigms. Due to its concise design and versatility, Scala's applications have been extended to a wide variety of fields such as data science and cluster computing. You will learn to write highly scalable, concurrent, and testable programs to meet everyday software requirements. We will begin by understanding the language basics, syntax, core data types, literals, variables, and more. From here you will be introduced to data structures with Scala and you will learn to work with higher-order functions. Scala's powerful collections framework will help you get the best out of immutable data structures and utilize them effectively. You will then be introduced to concepts such as pattern matching, case classes, and functional programming features. From here, you will learn to work with Scala's object-oriented features. Going forward, you will learn about asynchronous and reactive programming with Scala, where you will be introduced to the Akka framework. Finally, you will learn the interoperability of Scala and Java. After reading this book, you'll be well versed with this language and its features, and you will be able to write scalable, concurrent, and reactive programs in Scala.
Table of Contents (21 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Data types


We have just covered literals in Scala, and with that, we've almost covered the introduction to all the data types existing as well. We discussed how to define Int, Long, Short, and Byte data types. Along with these, we also covered Float and Double type. Together, all these are called numeric data types. The Byte, Short, and Char are called sub-range types. We also talked about Boolean, character, and strings:

Numeric value types

In Java, these numeric types are called Primitive Types, and then there are user-defined types as well. But in Scala, these somewhat similar types to primitives, are called value types. Objects of these value types are not represented by an object in the underlying runtime system. Thus, arithmetic operations performed are in the form of methods defined for Int, and other numeric value types. Think about it, it means that we can perform method operations on these. So let's take an example:

scala> val x = 10 //x is an object of Type Int
x: Int = 10  /...