Explain Future, async/await and Stream in Dart.

Summary

A Future is a single value available later; async/await writes asynchronous code sequentially without blocking the event loop; a Stream delivers multiple values over time, consumed with await for or listen.

Longer Answer

Run independent futures concurrently with Future.wait or a record's .wait; add timeouts; use isolates for CPU-heavy work.

Key Points

• Single event loop per isolate.
• Futures for one result, Streams for many.
• Concurrency via Future.wait; parallelism via isolates.

Deep dive: Dart Fundamentals: Async Dart