flutter packages,icons,custom widgets,GestureDetecter,enum,ternary operator,functions as objects

 https://pub.dartlang.org/flutter

flutter packages link.

many community open source packages available.

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const is compile time constant.

const int myConst = 2 + 5;//grabbbing data at runtime and setting it is not possible.

const int myConst = DateTime.now() // doesn't support as it is runtime value.

final int myFinal = DateTime.now();//final value can be grabbed from runtime.

for icons:

font_awesome_flutter package

Cutom flutter widgets.

GestureDetecter can be used for event handling,as FLatButton removes styling.

onTap: event

concepts used in below project:

enum,ternary operator,functions as objects,

Repo: https://github.com/uday1kiran/fluttercourse_bmicalculator

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