Project Euler 06

projecteuler06.scala

    def sum(to:Int) = {
      List.range(1, to + 1).sum
    }                                             //> sum: (to: Int)Int
    def sumSquares(to:Int) = {
      to * (to +1) * ( 2 * to + 1 ) / 6
    }                                             //> sumSquares: (to: Int)Int

    sum(10)                                       //> res1: Int = 55
    sumSquares(10)                                //> res2: Int = 385
    
    math.pow(sum(100), 2).toInt - sumSquares(100) //> res3: Int = 25164150