Boolean is a type that allows variables to have the values
false, and is therefore used to represent truth. Control statements such as
repeat until accept boolean expressions, which they use to decide whether or not they will execute their bodies. Booleans are operated on by the logic operators.
- Ierusalimschy, Roberto (March 2006). Programming in Lua. p. 29. ISBN 8590379825.
- Ierusalimschy, Roberto (March 2006). Programming in Lua. p. 49-50. ISBN 8590379825.