The [[AS]] keyword defines a variable data [[Variable Types|type]]. 


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* AS defines the variable or array type AS [[_BIT]], [[_BYTE]], [[INTEGER]], [[LONG]], [[_INTEGER64]], [[SINGLE]], [[DOUBLE]], [[_FLOAT]] or [[STRING]].
* Specifies a variable's [[Variable Types|type]] in a declarative statement or parameter list using:
** [[DIM]] or [[REDIM]]
** [[DECLARE LIBRARY]]
** [[SUB]]
** [[FUNCTION]]
** [[TYPE]]
** [[SHARED]]
** [[COMMON SHARED]]
** [[STATIC]]


===Details===
* Specifies a '''[[parameter]]''' variable's type in a [[SUB]] or [[FUNCTION]] procedure. '''Cannot be used to define a function's [[Variable Types|type]]'''
* Specifies an element's type in a user-defined data [[TYPE]].
* Assigns a file number to a file or device in an [[OPEN]] statement.
* Specifies a field name in a random-access record (see [[FIELD]])
* Specifies a new file name when you rename a file (see [[NAME]])
* '''NOTE: Many QBasic keywords can be used as variable names if they are created as [[STRING]]s using the suffix '''$'''. You cannot use them without the suffix, use a numerical suffix or use [[DIM]], [[REDIM]], [[_DEFINE]], [[BYVAL]] or [[TYPE]] variable [[AS]] statements.'''


{{PageSeeAlso}}
* [[DIM]], [[REDIM]]
* [[_DEFINE]] 
* [[BYVAL]], [[TYPE]]
* [[Variable Types]]


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