In what situations is it preferable to use the const keyword in code?

In Flutter, the const keyword is used to create compile-time constants, which are objects or values that do not change during runtime. This allows for performance optimization, as such objects are created once and reused.

It is preferable to use const:

• When creating widgets that do not depend on variables and do not change.
• For immutable values, such as strings, numbers, lists that will not be modified.
• In places where reducing object re-creation and increasing rendering efficiency is important.

Example:

const Text('Hello, world!');

Here, the Text widget is created as a constant, which improves application performance.