Kas saaksite selgitada võtmesõna const sisemist mehhanismi programmeerimiskeeltes?

The keyword const is used to declare constants — values that are known at compile time and do not change during program execution. In programming languages like Dart (used in Flutter), const allows creating immutable objects that are compiled into the code once and can be reused.

Internal mechanics:

• Values declared with const are computed at compile time.
• Such objects are stored in a special memory area and are not recreated on each call.
• This improves performance and reduces memory usage.
• In Flutter, const widgets help optimize rendering, as they are not recreated during re-draws.

Example:

const pi = 3.14;
const list = [1, 2, 3];

void main() {
  const anotherList = [1, 2, 3];
  print(identical(list, anotherList)); // true, because constant objects are identical and reused
}