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I like GAel solution, but to come up with something different, If you're just starting with Scala 3, stick to the traditional main method (def main(args: Array[String]): Unit) or use the simpler @main approach with explicit arguments (@main def addNumbers(arg1: String, arg2: String): Unit).

If you want to access args as Array[String], you should define the main method without the @main annotation:

object AddNumbers {
  def main(args: Array[String]): Unit = {
    if (args.length < 2) {
      println("Please provide two numbers as arguments.")
    } else {
      println(args(0).toDouble + args(1).toDouble)
    }
  }
}

You can run this program with command-line arguments, and args will hold all arguments in an array.

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