Truthy and Falsy
In programming, anything that returns
true in a conditional is called truthy. Anything that returns
false in a conditional is called falsy. All object types can be described as either truthy or falsy.
All values in ZML are truthy except
false. Strings, even when empty, are truthy.
The falsy values in ZML are
The table below summarizes what is truthy or falsy in ZML.