Can you explain the internal mechanics of the keyword const in programming languages?

The const keyword is used to declare constants — values known at compile time that do not change during execution. In programming languages like Dart (used in Flutter), const allows creating immutable objects that are compiled 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 on rebuilds.

Example:

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

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