September 2017 Update

Task/Fibonacci-sequence/Sidef/fibonacci-sequence-1.sidef

@@ -1,7 +1,5 @@
 func fib_iter(n) {
-    var fib = [1, 1];
-    (n - fib.len).times {
-        fib = [fib[-1], fib[-2] + fib[-1]]
-    };
-    fib[-1];
+    var (a, b) = (0, 1)
+    { (a, b) = (b, a+b) } * n
+    return a
 }