Data commit

Task/Fibonacci-sequence/Dart/fibonacci-sequence.dart

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+int fib(int n) {
+  if (n==0 || n==1) {
+    return n;
+  }
+  var prev=1;
+  var current=1;
+  for (var i=2; i<n; i++) {
+    var next = prev + current;
+    prev = current;
+    current = next;
+  }
+  return current;
+}
+
+int fibRec(int n) => n==0 || n==1 ? n : fibRec(n-1) + fibRec(n-2);
+
+main() {
+  print(fib(11));
+  print(fibRec(11));
+}