RosettaCodeData/Task/Fibonacci-sequence/Sidef/fibonacci-sequence-4.sidef
2017-09-25 22:28:19 +02:00

5 lines
118 B
Text

func fib_closed(n) {
define S = (1.25.sqrt + 0.5)
define T = (-S + 1)
(S**n - T**n) / (-T + S) -> round
}