======Existence Operators======

Existence Operators perform operations to do with the existence of [[PTPScript:Variables|Variables]].

^ Symbol ^ [[PTPScript:Operators#Operator Types|Type]] ^ Name ^ Description ^ Example ^
| %% ??? %% | Prefix | Existence | Returns **''true''** if the variable exists, or **''false''** otherwise | ''%% ??? a %%'' |
| %% destroy %% | Prefix | Destruction | Destroys the Variable (or [[PTPScript:Types:Array|Array]] key) named | ''%% destroy a %%'' |

<note warning>
Existence operators will only function on Variables. In particular, an error will be generated if ''destroy'' is applied to a Variable that does not exist.
</note>

<note tip>
The ERR [[Logical|Logical]] Operator - ''|?|'' - is essentially a convenient, in-line existence check, and is the logical comparison version of ''???''.
</note>