Scala #

• Site
• A tour of Scala
• Book

Scala is a modern multi-paradigm programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It seamlessly integrates features of object-oriented and functional languages.

NB: This short introduction uses Scala 3 and assumes that you are already familiar with the main principles of programming (i.d. variables, statements, conditions, loops, functions, methods, classes...)

Syntax #

Here is quick taste of the language. We'll go over the main syntax feature of the language.

@main def hello: Unit =
  println("Hello world!")
  println(msg)

val msg: String = "I was compiled by Scala 3. :)"

In a few lines:

• No semicolons (;)
• Curly braces ({}) are optional
• Use val to define values and def to define methods/functions
• Types can be inferred or explicitly defined using colon (:) notation

Good to know #

• Scala compiles to JVM binary.
• Scala is strongly typed.
• The Scala compiler is extremly powerful.
• Scala is probably the language that best combines imperative programming, functionnal programming and object-oriented programming.