The hot reload feature allows you to quickly and easily perform an experiment in the project. It helps to build UI, add new features, fix bugs, and make app development fast. To perform hot reloading of a Flutter app, do the following steps:
Run the app in a supported Flutter editor or terminal window.
Modify any of the Dart files in the project.
If you use an IDE that supports Flutter, then select Save All or click the Hot Reload button on the toolbar. Immediately, you can see the result in your emulator or real device.