[Swift] fibonacci

Author: matheustorresii

src/swift/fibonacci.swift

@@ -0,0 +1,35 @@
+//
+//  fatorial.swift
+//
+//  Created by Matheus Torres on 13/11/20.
+//
+
+func fibonacci(_ number: Int) -> Int {
+    if number <= 1 {
+        return number
+    } else {
+        var currentNumber: Int = 1
+        var nextNumber: Int = 0
+        
+        for _ in 0...number {
+            let tempNumber = nextNumber
+            nextNumber = nextNumber + currentNumber
+            currentNumber = tempNumber
+        }
+        
+        return currentNumber
+    }
+}
+
+func fibonacciRecursiva(_ number: Int) -> Int {
+    if number < 2 {
+        return number
+    } else {
+        return (fibonacciRecursiva(number - 1) + fibonacciRecursiva(number - 2))
+    }
+}
+
+let index: Int = 15
+
+print(fibonacci(index))
+print(fibonacciRecursiva(index))