Editing Comparison of C Sharp and Java (section)

====Functional Style====
The above algorithm can be written even more consistently, using {{code|Stream.iterate}}. The iterate method receives a seed parameter, and a function that specifies what to do for each iteration. In this case, the seed can be a record class with the 2 initial values of the algorithm, and its respective transformation in each iteration. In short, the iterate method makes unnecessary the implementation of a Supplier.
<syntaxhighlight lang="java" style="font-size:90%">

record Pair(int a, int b) {};

Stream
  .iterate(new Pair(0, 1), p -> new Pair(p.b, p.a + p.b))
  .limit(10)
  .map(p -> p.a)
  .forEach(System.out::println);
</syntaxhighlight>

|Notes for the C# version:
* The method is defined as returning instances of the interface {{csharp|IEnumerable<int>}}, which allows client code to repeatedly request the next number of a sequence.
* The {{csharp|yield}} keyword converts the method into a generator method.
* The {{csharp|yield return}} statement returns the next number of the sequence and creates a continuation so that subsequent invocations of the {{csharp|IEnumerable}} interface's {{csharp|MoveNext}} method will continue execution from the following statement with all local variables intact.
* Tuple-assignment avoids the need to create and use a temporary variable when updating the values of the variables {{mono|a}} and {{mono|b}}.
|}