Introduction to Scala

Introduction to Scala

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1. Getting Started

First, we'll explore Scala's advantages, how the language works, its syntax, writing basic programs, and the use of comments.

How Scala Works?

Scala’s Syntax

Writing Your First Program

Writing Comments

2. Variables and Data Types

Like every other programming language, Scala is based upon variables and data types, so let's learn about Scala's basic data types, variable type inference, mutable vs immutable types, arithmetic, assignment operators, and character specifics.

Basic Data Types

Challenge: Specify the Data Types

Variable Type Inference

Mutable and Immutable Variables/Data Types

Arithmetic Operators

Order of Operations

Challenge: Calculate Customer Acquisition Cost

Assignment Operators

More about Char

3. Conditional Statements and Loops

Now it's time to master the use of conditional statements and loops which will allow us to make our programs flexible and avoid code repetition.

If-Else Statement

Combining Multiple Conditions

Challenge: Nesting in Loops

4. Arrays

Arrays are essential for storing multiple values and manipulate them conveniently. Without further ado, let's learn how to create arrays, process them and apply these concepts in practice.

What is an Array?

Iterating in Arrays

Challenge: Fill an Array

Two-Dimensional Arrays

Iterating in 2D Arrays

Challenge: Fill a 2D Array

5. Strings

Finally, we'll learn how to deal with strings in Scala efficiently by discovering the nature of strings, effective iteration techniques, key string methods, and their application.

What is a String?

Iterating in Strings

Commonly Used String Methods

Challenge: Applying String Methods in Practice

Contenido del Curso

Introduction to Scala

Introduction to Scala

Challenge: Applying String Methods in Practice

Task

Your task is the following:

Create a mutable String variable named sentence with the following value: " Today we are going to lea.rn S.cala ".
Remove leading and trailing whitespaces using the appropriate method and save the result in the sentence variable.
Create an array of words (strings) named words based on the sentence string using the appropriate method. Words are separated by whitespaces.
Iterate over the indices of the words array using the appropriate property.
Remove the dots from each word by replacing the dot . with an empty string using the appropriate method.
Print the current word (each word should be printed on a separate line).

Main


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object Main {
  def main(args: Array[String]): Unit = {
    ___  // Create a string
    ___  // Remove leading and trailing whitespaces
    val ___ = ___  // Create an array of words
    for (i <- ___.___) {  // Iterate over the indices
      ___  // Remove the dot
      ___  // Print the current word
    }
  }
}

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Sección 5. Capítulo 4

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