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degree/immutable-rec-sum.scala

Last active December 21, 2015 22:28
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immutable-rec-sum.scala
import scala.annotation.tailrec
@tailrec def sumrec(sum: Int, current: Int, end: Int):Int = if (current > end) sum else sumrec(sum + current, current + 1, end)
def sum(start: Int, end: Int) = sumrec(0, start, end)
println(sum(1, 100))
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