Options

Options

Scala's Option[T] represents a value that may or may not exist — it's either Some(value) or None:

def safeDivide(a: Int, b: Int): Option[Int] =
  if (b == 0) None else Some(a / b)

println(safeDivide(10, 2))   // Some(5)
println(safeDivide(10, 0))   // None

getOrElse

Provide a default value with getOrElse:

val result = safeDivide(10, 0).getOrElse(-1)
println(result)  // -1

Your Task

Write a function safeHead that takes a List[Int] and returns Some(first) if the list is non-empty, or None if it's empty.