AtomicKotlinCourse/Preventing Failure/Check Instructions/Exercise 3/task.md

Check Instructions (#3)

This exercise further explores ranges, introduced in Looping & Ranges, and shows how they can be used with check instructions.

Create a class Level with two constructor arguments: val range: IntRange, and private var level: Int. level has a default argument that is the bottom value of range. The constructor should ensure that level is one of the values in range.

Add a read-only value property that produces the value of level.

Add a function up() that increments level only if the result is within range, and a function down() that decrements level only if the result is within range. Finally, add a function set(new: Int) that first ensures that new is within range and then assigns new to level.

Level is tested by the starter code in main().

_{This task doesn't contain automatic tests, so it's always marked as "Correct" when you run "Check". Please compare your solution with the one provided!}