Kotlin Tail Recursion
import java.math.BigInteger fun main(args: Array<String>) { val n = 100 val first = BigInteger("0") val second = BigInteger("1") println(fibonacci(n, first, second)) } tailrec fun fibonacci(n: Int, a: BigInteger, b: BigInteger): BigInteger { return if (n == 0) a else fibonacci(n-1, b, a+b) }