Data update

Task/Fibonacci-sequence/Dart/fibonacci-sequence-2.dart

@@ -0,0 +1,13 @@
+Iterable<int> fibonacci(int n) sync* {
+  int a = 1, b = 1;
+
+  for (int i = 0; i < n; i++) {
+    yield a;
+
+    int temp = a;
+    a = b;
+    b = temp + b;
+  }
+}
+
+void main() => print(fibonacci(20));

Task/Fibonacci-sequence/Dart/fibonacci-sequence-3.dart

@@ -0,0 +1,6 @@
+Iterable<int> fibonacci([int n = 1, int m = 1]) sync* {
+  yield n;
+  yield* fibonacci(m, n + m);
+}
+
+void main() => print(fibonacci().take(20));

Task/Fibonacci-sequence/Dart/fibonacci-sequence-4.dart

@@ -0,0 +1,13 @@
+Iterable<int> fibonacci() sync* {
+  int a = 1, b = 1;
+
+  while (true) {
+    yield a;
+
+    int temp = a;
+    a = b;
+    b = temp + b;
+  }
+}
+
+void main() => print(fibonacci().take(20));