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  3. Introduction to Scala

Exercise

Scala is object-oriented

Scala is an object-oriented language because every value is an object and every operation is a method call. This fact means the following lines of code both result in the value 6:

val sumB = 2.+(4)
val sumA = 2 + 4

The same principle applies to the subtraction operator (-), as operators are methods in Scala. In this exercise, you'll experience how Scala is object-oriented by converting code that Scala executes behind-the-scenes to the code you'll normally write in practice.

scala> val symbolAceSpades: String = "A♠"

symbolAceSpades: String = A♠

Instructions

100 XP
  • Rewrite the provided subtraction code in standard arithmetic notation (e.g., 2 + 4).
  • Print the difference using the println function.