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object m1 {
def factorial(n: Int): Int =
if (n == 0) 1
else n * factorial(n-1);
}
object m2 {
def factorial(n: Int): Int = {
def factIter(n: Int, acc: Int): Int = {
if (n == 0) acc
else factIter(n - 1, acc * n)
}
factIter(n, 1)
}
}
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