Functions

Functions name reusable work and return values to the caller.

Functions.scala

object Main {
  def square(value: Int): Int = {
    value * value
  }

  def main(args: Array[String]): Unit = {
    val side = 
    val area = square(side)

    println("side=" + side)
    println("area=" + area)
  }
}

object Main {
  def square(value: Int): Int = {
    value * value
  }

  def main(args: Array[String]): Unit = {
    val side = 
    val area = square(side)

    println("side=" + side)
    println("area=" + area)
  }
}

object Main {
  def square(value: Int): Int = {
    value * value
  }

  def main(args: Array[String]): Unit = {
    val side = 
    val area = square(side)

    println("side=" + side)
    println("area=" + area)
  }
}

function call A function call runs the named function and can use the returned value in another expression.