Factorial: Difference between revisions
→{{header|Scala}}
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===Imperative===
An imperative style using a mutable variable:
<syntaxhighlight lang="scala">def factorial(n: Int) = {
var res = 1
for (i <- 1 to n)
res *= i
res
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Using naive recursion:
<syntaxhighlight lang="scala">def factorial(n: Int): Int =
if (n
else
Using tail recursion with a helper function:
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