Back To Module Home

Learn Scala from Scratch

0% completed

Getting to Know Scala

Scala: A History A 'Scalable' Language A Featurette: Scala Features Who's Using Scala?

Variables and Types

Variables in Scala

Printing in Scala

Immutable Variables

Mutable Variables

Challenge: Declaring a Variable

Solution Review: Declaring a Variable

Type Casting in Scala

Challenge: Type Casting

Solution Review: Type Casting

Strings and Other Literals

Operating with Operators

A Brief Introduction to Methods and Functions An Introduction to Operators Arithmetic Operators Relational Operators Logical Operators Bitwise Operators Assignment Operators Challenge: Using Multiple Operators Solution Review: Using Multiple Operators Operator Precedence Challenge: Temperature Conversion Solution Review: Temperature Conversion Chapter Quiz

Strings and How to Use Them

An Introduction String Interpolation with 's'Challenge: Embed a Variable in a String Solution Review: Embed a Variable in a String String Interpolation with 'f'Challenge: Formatting Strings Solution Review: Formatting Strings String Interpolation with 'raw'Testing String Equality Creating Multiline Strings Splitting Strings Finding Patterns in Strings Replacing Patterns in Strings Methods for Comparing Strings Challenge: Searching a String Solution Review: Searching a String Chapter Quiz

Scala's Collection Library

A Brief Introduction to Objects and Classes An Introduction to the Collection Library foreach: A Collection Method The Array Collection ArrayBuffers Challenge: Array of Integers Solution Review: Array of Integers Working with Lists Challenge: Appending an Element to a List Solution Review: Appending an Element to a List Getting Started with Vectors Creating a Range of Numbers LazyList: A Lazy Version of List Chapter Quiz

Control Structures

Control Structures in Scala Decide with if Optimizing an if Program Challenge: Pass or Fail Solution Review: Pass or Fail Loop with while Challenge: Oven is Ready!Solution Review: Oven is Ready!Iterate with for Challenge: Array of Squares Solution Review: Array of Squares Exception Handling with try Pattern Matching with Match Challenge: Color Wheel Solution Review: Color Wheel Types of Patterns Chapter Quiz

Getting Started with Functions

Defining a Function Challenge: Absolute Value Solution Review: Absolute Value Evaluation Strategies Quiz: CBV or CBN?Code Termination Recursive Functions Challenge: Sum of Lists Solution Review: Sum of Lists Learning by Example: Newton's Method Blocks Challenge: Max with Nested Functions Solution Review: Max with Nested Functions Lexical Scope Tail Recursion Challenge: Tail Recursion Solution Review: Tail Recursion Chapter Quiz

Higher-Order Functions

What are Higher-Order Functions?Learning by Example: Summation Summation with Higher-Order Functions Challenge: Write your First Higher-Order Function Solution Review: Write Your First Higher-Order Function Anonymous Functions Summation with Anonymous Functions Challenge: Anonymous Functions Solution Review: Anonymous Functions Functions Returning Functions Currying Summation with Currying Expanding a Multiple Parameter List Challenge: Using a Curried Function Solution Review: Using a Curried Function Chapter Quiz

Classes and Objects

Creating a Class in Scala Objects of a Class Creating an Object Using Constructor Parameters Learning by Example: checksum Singleton Objects: Companion Singleton Objects: Standalone Chapter Quiz

Conclusion

...

/

Type Casting in Scala

Type Casting in Scala

In the following lesson, you will be introduced to type casting and learn how to change the data type of a variable.

Introduction

Sometimes we find ourselves in a situation where we need the value of an already existing variable in a different data type than the one with which it was defined. This is where type casting comes in. Type casting is an approach which allows changing the data type of a variable or an expression from one to another.

One thing to remember is that not every data type can be converted to a data type of choice. Let’s look ...