Boolean

Booleans are represented by the bool type, and can only be one of two values: true and false.

bool is_lang_cool = true
bool is_lang_lame = false

This makes a boolean effectively an enum:

enum bool {
  true,
  false
}

Internally, these are represented by a single 8-bit byte, that can be either 0 (false) or 1 (true).