Counter with Pattern Matching - Scala Typing CST Test

Counter with Pattern Matching — Scala Code

Demonstrates Scala pattern matching to display custom messages for counter values.

object PatternMatchCounter {
	var count = 0
	var isDark = false

	def updateUI(): Unit = {
		val theme = if(isDark) "Dark" else "Light"
		count match {
		case 0 => println(s"Counter is zero. Theme: $theme")
		case n if n > 0 => println(s"Counter positive: $count. Theme: $theme")
		case _ => println(s"Counter negative: $count. Theme: $theme")
		}
	}

	def increment(): Unit = { count += 1; updateUI() }
	def decrement(): Unit = { count -= 1; updateUI() }
	def toggleTheme(): Unit = { isDark = !isDark; updateUI() }

	def main(args: Array[String]): Unit = {
		updateUI(); increment(); increment(); toggleTheme(); decrement()
	}
}
PatternMatchCounter.main(Array())

Scala Language Guide

Scala is a high-level, general-purpose programming language that combines object-oriented and functional programming paradigms. It is designed to be concise, expressive, and interoperable with Java, running on the Java Virtual Machine (JVM).

More Scala Typing Exercises

Practice Other Languages