중첩 메소드

def factorial(x: Int): Int = {
  def fact(x: Int, accumulator: Int): Int = {
    if (x <= 1) accumulator
    else fact(x - 1, x * accumulator)
  }  
  fact(x, 1)
}

println("Factorial of 2: " + factorial(2))
println("Factorial of 3: " + factorial(3))

def factorial(x: Int): Int =
  def fact(x: Int, accumulator: Int): Int =
    if x <= 1 then accumulator
    else fact(x - 1, x * accumulator)
  fact(x, 1)

println("Factorial of 2: " + factorial(2))
println("Factorial of 3: " + factorial(3))

→ 메소드 정의를 중첩할 수 있다.