Merge pull request #3127 from gkepka/scala-book-prelude-preliminaries

Scala 2 Book migration - Prelude and Preliminaries

Author: gkepka

_overviews/scala3-book/introduction.md

@@ -25,9 +25,9 @@ Scala’s syntax, grammar, and features have been re-thought, debated in an open
 The book begins with a whirlwind tour of many of Scala’s features in the [“A Taste of Scala” section][taste].
 After that tour, the sections that follow it provide more details on those language features.
 
-{% comment %}
-We should have a link structure on the whole tour here
-{% endcomment %}
+## A bit of background
+
+Scala was created by [Martin Odersky](https://en.wikipedia.org/wiki/Martin_Odersky), who studied under [Niklaus Wirth](https://en.wikipedia.org/wiki/Niklaus_Wirth), who created Pascal and several other languages. Mr. Odersky is one of the co-designers of Generic Java, and is also known as the “father” of the `javac` compiler.
 
 [reference]: {{ site.scala3ref }}/overview.html
 [taste]: {% link _overviews/scala3-book/taste-intro.md %}

_overviews/scala3-book/taste-intro.md

@@ -21,6 +21,42 @@ can be installed by following our [getting started guide][get-started].
 > Alternatively you can run the examples in a web browser with [Scastie](https://scastie.scala-lang.org), a
 > fully online editor and code-runner for Scala.
 
+## Comments
+
+One good thing to know up front is that comments in Scala are just like comments in Java (and many other languages):
+
+{% tabs comments %}
+{% tab 'Scala 2 and 3' for=comments %}
+```scala
+// a single line comment
+
+/*
+ * a multiline comment
+ */
+
+/**
+ * also a multiline comment
+ */
+```
+{% endtab %}
+{% endtabs %}
+
+## IDEs
+
+The two main IDEs (integrated development environments) for Scala are:
+
+- [IntelliJ IDEA](/getting-started/intellij-track/building-a-scala-project-with-intellij-and-sbt.html)
+- [Visual Studio Code](https://scalameta.org/metals/docs/editors/vscode/)
+
+## Naming conventions
+
+Another good thing to know is that Scala naming conventions follow the same “camel case” style as Java:
+
+- Class names: `Person`, `StoreEmployee`
+- Variable names: `name`, `firstName`
+- Method names: `convertToInt`, `toUpper`
+
+More on conventions used while writing Scala code can be found in the [Style Guide](/style/index.html).
 
 [reference]: {{ site.scala3ref }}/overview.html
 [get-started]: {% link _overviews/getting-started/install-scala.md %}