[Gambas-user] What does the "?" for a datatype?

[Stefano Palmeri]

Il martedì 5 maggio 2009 10:36:29 Rolf-Werner Eilert ha scritto:
> Hi folks,
>
> just stumbled over this: When typing AS Integer or AS Boolean, the IDE
> gives me several completions to choose from:
>
> Integer
> Integer?
> Integer[]
>
> or
>
> Boolean
> Boolean?
> Boolean[]
>
> What is the questionmark variation good for?
>
> Rolf
>

Integer? is the same as  IsInteger
Boolean? is the same as IsBoolean

See datatype functions in Gambas online help (or local).

http://www.gambasdoc.org/help/cat/type?v3

Stefano


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