The first type of constants is one that is spread most across programming languages: Booleans. For your information, in haXe Booleans have the type Bool. The following are two expressions, which are Boolean constants:

That's both easy and important. By the way, in haXe Bool is indeed an Enum (if you don't know what this is, don't worry, we will learn about it later). This Enum has two values, and true and false are just reference to these values.

Booleans are generally used to represent the truthiness of things. For example, when one is presented with a checkbox in an interface, the "checked" property of the checkbox can be of type Bool.

This one is easy; you can use integers constants by simply writing their values, for example:

You can also use the hexadecimal notation by starting your value with...