SKB – Scala Challenge 1


This article is part of the Scala knowledge bits Series.

Periodically, I will publish new exercises so you can slowly build up knowledge about Scala.

It is designed to be done in a very short amount of time and learn a little bit each day, just to create a routine.

This episode will teach you about Scala Challenge 1.

Hope you are going to enjoy it! It is designed for anyone to learn Scala from scratch and slowly learn, one Bit at a time.

After this Bit, I would love to hear your feedback in the comments down below.

Feel free to join the Discord server as well if you would like some help and support from the rest of our community.

What are we learning today?

Today we are going to learn about Scala Challenge 1 !

Today will be a practice challenge ! I had this idea in the corner of my mind for a while, but today is the day.

We have been learning a lot together in those past months. It is time to now apply everything we practiced so far in a little challenge exercise. You will have to implement things yourself and fix the code.

If you have trouble, feel free to jump in the Discord server to get help.

Time to try on the exercise on your own and scroll down for more information when you are done or if you are stuck.


Here is an exercise to complete today.

If I did my job well, you should be able to guess by yourself the solution based on what you previously learned and based on the clues.

But if you get stuck, scroll down to get more information.

The goal of the exercise is to replace the ??? by a piece of code so that the exercise compiles and that’s how you win! Good luck!

You can fill the exercise right in here:

Or, if it does not load, go on to Scastie (xYbhCpOyRGCalWW4CgA6Iw).

More information about Scala Challenge 1

In this exercise you will learn (or have learned, if you have already solved the puzzle) about Scala Challenge 1.

How was it ?! Did you manage to solve all the problems ?

What tools did we use to solve this challenge ?

  • Math, for the rounding and totals
  • trait and abstract class for the display and Item
  • Case class
  • Object
  • copy
  • And some fun with text interpolation to display a beautiful receipt.

I hope that was fun. This is the first time, so please let me know if you have any feedback. Was it too easy ? Was it too hard ?

Feel free to go back to the exercise, modify the code to try out new things and get a better intuition for Scala Challenge 1.


I hope you have learned something new or had fun during this Scala Knowledge Bit.

Please ask questions or post feedback in the comments below.

Feel free to try on the next Scala Knowledege Bit.

If you are curious about the previous Scala knowledge Bits, go check it out! 🙂

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