Question

How to use an anonymous function in Scala

Answer 1

// Anonymous function = A function with no identifier.

object Main {
  def main(args: Array[String]): Unit = {

    // Anonymous function (function literal) that takes two Ints and returns their sum.
    // (a, b) => a + b   ← this is Scala’s concise lambda syntax.
    val add: (Int, Int) => Int = (a, b) => a + b

    // Use the anonymous function
    val result = add(10, 20)

    println(result)
  }
}


/*
run:

30

*/

 

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Answer 2

object Main {
  def main(args: Array[String]): Unit = {

    val add = (a: Int, b: Int) => a + b

    println(add(10, 20))
  }
}


/*
run:

30

*/

 

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Answer 3

object Main {
  def main(args: Array[String]): Unit = {

    println(((a: Int, b: Int) => a + b)(10, 20))
  }
}


/*
run:

30

*/

 

70+ SQL courses for beginners and professionals