FLUTTER INTERVIEW QUESTIONS
What’s the difference between const and final in Dart?
1 min readDec 19, 2019
Both final and const prevent a variable from being reassigned and const variables are implicitly final.
So, once you assign value to a const or final variable, you can not change it.
A const variable is a compile-time constant, which means that it must be created from constants available in compile-time.
void main() { const int a = 3;
final int b = 4; const int c = a * 9;
const int d = a * b; //this will not compile final DateTime now = DateTime.now();
const DateTime anotherNow = DateTime.now(); //this will not compile a = 5; //this will not compile
b = 6; //this will not compile}
📖 Use https://dartpad.dartlang.org/ for testing examples 📖
