Scala nested functions
What I can define a function in Scala function defined functions within a function called local functions.
The following examples we realize factorial operation, and use the built-in functions:
object Test { def main(args: Array[String]) { println( factorial(0) ) println( factorial(1) ) println( factorial(2) ) println( factorial(3) ) } def factorial(i: Int): Int = { def fact(i: Int, accumulator: Int): Int = { if (i <= 1) accumulator else fact(i - 1, i * accumulator) } fact(i, 1) } }
Implementation of the above code, the output is:
$ scalac Test.scala $ scala Test 1 1 2 6