Welcome to our lesson on Scala's basic data types. In this lesson, we'll delve into numbers, booleans, characters, strings, and arrays. Additionally, we'll explore how we can declare these data types — either explicitly or implicitly. These fundamentals will enable you to create and manipulate data effectively in your Scala programs.

In Scala, numbers are categorized by their memory sizes and value ranges. Integral numbers such as Int and Long require 4 bytes and 8 bytes of memory, respectively. For numbers with decimal points, we have Float and Double. The Float type requires 4 bytes of memory and supports approximately seven decimal places, while Double requires 8 bytes of memory and can handle around 15 decimal places.

Here's an example illustrating the different number types:

Starting with Scala 2.13, you can use underscores to make large numbers more readable: