println("hello there")                                                          //hello there
                                                                                //res0: Unit = ()
def mapRangeSum(f: Int => Int)(start: Int, end: Int) = {                        //
  start to end map f sum                                                        //mapRangeSum: mapRangeSum[](val f: Int => Int)(val start: Int,val end: Int) => Int
}                                                                               //
                                                                                //
println(mapRangeSum(x => x + 2)(1, 50))                                         //
                                                                                //1375
val mapRangeSum1 = (f: Int => Int) => {                                         //res1: Unit = ()
  (start: Int, end: Int) => {                                                   //
    (start to end).map(x => f(x)).sum                                           //mapRangeSum1: (Int => Int) => ((Int, Int) => Int) = <function1>
  }                                                                             //
}                                                                               //
                                                                                //
println(mapRangeSum1(x => x + 2)(1, 50))                                        //