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♠
This exercise is part of the course
Introduction to Scala
Exercise instructions
- Rewrite the provided subtraction code in standard arithmetic notation (e.g., 2 + 4).
- Print the difference using the
printlnfunction.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
// Calculate the difference between 8 and 5
val difference = 8.-(5)
// Print the difference
println(___)