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Introduction to Scala
course content

Course Content

Introduction to Scala

Introduction to Scala

1. Getting Started
Why Scala?How Scala Works?Scala’s SyntaxWriting Your First ProgramWriting Comments
2. Variables and Data Types
Basic Data TypesChallenge: Specify the Data TypesVariable Type InferenceMutable and Immutable Variables/Data TypesArithmetic OperatorsOrder of OperationsChallenge: Calculate Customer Acquisition CostAssignment OperatorsMore about CharSummary Quiz
3. Conditional Statements and Loops
If-Else StatementIf-Else ChainCombining Multiple ConditionsWhile LoopDo-while LoopFor LoopChallenge: Nesting in LoopsSummary Quiz
4. Arrays
What is an Array?Iterating in ArraysChallenge: Fill an ArrayTwo-Dimensional ArraysIterating in 2D ArraysChallenge: Fill a 2D ArraySummary Quiz
5. Strings
What is a String?Iterating in StringsCommonly Used String MethodsChallenge: Applying String Methods in PracticeSummary Quiz

Challenge: Applying String Methods in Practice

Task

Your task is the following:

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

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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Section 5. Chapter 4
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