Question

What do you mean by Streams in Flutter?

Answer 1

In asynchronous programming, streams are used to provide a sequence of data in an asynchronous manner. Similar to a pipe, we put a value on one end and a listener receives it on the other. Several listeners can be put into one stream, and they'll all get the same value when they're put in the pipeline. It's possible to create and manage streams through the SteamController. 

The Stream API provides the await for and listen() methods for processing streams. Streams can be created in many ways, but they can only be used in the same manner. Here is an example: 

Future<int> sumStream(Stream<int> stream) async {   
  var sum = 0;   
   await for (var value in stream) {   
     sum += value;   
   }   
   return sum;   
}