What is difference between FutureBuilder and StreamBuilder in Flutter?

FutureBuilder solves a square value and returns the result after 5 seconds, till then we show a progress indicator to the user. StreamBuilder shows a stopwatch, incrementing _count value by 1 every second.

Snapshot is the result of the Future or Stream you are listening to in your FutureBuilder . Before interacting with the data being returned and using it in your builder, you have to access it first.

A builder is a Flutter design pattern in which the construction code of a widget is defined outside of its class . Builder functions are callback interfaces that pass data (often layout-specific) to the parent widget which returns a child based on that data.