QB64-PE/internal/help/CLEAR.txt

The [[CLEAR]] statement clears all variable and array element values in a program.


{{PageSyntax}}
: [[CLEAR]] [, {{Parameter|ignored&}} , {{Parameter|ignored&}}]


{{PageDescription}}
* All parameters are optional and ignored by '''QB64'''.
* Normally used to clear all program variable and [[Arrays|array]] values where numerical values become zero and string values become empty ("").
* It does not clear [[CONST|constant]] values.
* Closes all opened files.
* [[$DYNAMIC]] or [[REDIM]] arrays will need to be [[REDIM|redimensioned]] or an [[ERROR Codes|error]] will occur when referenced because they are removed.


{{PageExamples}}
''Example:'' Using CLEAR to clear array elements from [[STATIC|static]] arrays or arrays created using [[DIM]].
{{CodeStart}} '' ''
{{Cl|CLS}}
{{Cl|DIM}} array(10)   'create a {{Cl|$STATIC}} array
array(5) = 23

{{Cl|PRINT}} array(5)

{{Cl|CLEAR}}

{{Cl|PRINT}} array(5) '' ''
{{CodeEnd}}
:''Note:'' If you change DIM to REDIM a "Subscript out of range" error will occur because a [[$DYNAMIC]] array is removed by CLEAR.


{{PageSeeAlso}}
* [[ERASE]]
* [[REDIM]], [[_PRESERVE]]
* [[Arrays]], [[&B|_BIT arrays]]


{{PageNavigation}}
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