cairo by example

constants

Constants store data that cannot be modified, just like immutable variables.

The key differences are:

• They are defined at compile time.
• They are defined in the global scope.
• Use the keyword const instead of let.
• By convention, named in SCREAMING_SNAKE_CASE.
• Their type must be annotated.
• Currently they only can store literal constants

use debug::PrintTrait;

const ONE_HOUR_IN_SECONDS: u32 = 3600;
const TICKTACKTOE_PLAYER_COUNT: u8 = 2;
const IS_COMPLETE: bool = 1;

fn main() {
  ONE_HOUR_IN_SECONDS.print();
}