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40 lines
1.2 KiB
Plaintext
40 lines
1.2 KiB
Plaintext
The [[CLEAR]] statement clears all variable and array element values in a program.
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{{PageSyntax}}
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: [[CLEAR]] [, {{Parameter|ignored&}} , {{Parameter|ignored&}}]
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{{PageDescription}}
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* All parameters are optional and ignored by '''QB64'''.
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* Normally used to clear all program variable and [[Arrays|array]] values where numerical values become zero and string values become empty ("").
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* It does not clear [[CONST|constant]] values.
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* Closes all opened files.
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* [[$DYNAMIC]] or [[REDIM]] arrays will need to be [[REDIM|redimensioned]] or an [[ERROR Codes|error]] will occur when referenced because they are removed.
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{{PageExamples}}
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''Example:'' Using CLEAR to clear array elements from [[STATIC|static]] arrays or arrays created using [[DIM]].
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{{CodeStart}} '' ''
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{{Cl|CLS}}
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{{Cl|DIM}} array(10) 'create a {{Cl|$STATIC}} array
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array(5) = 23
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{{Cl|PRINT}} array(5)
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{{Cl|CLEAR}}
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{{Cl|PRINT}} array(5) '' ''
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{{CodeEnd}}
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:''Note:'' If you change DIM to REDIM a "Subscript out of range" error will occur because a [[$DYNAMIC]] array is removed by CLEAR.
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{{PageSeeAlso}}
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* [[ERASE]]
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* [[REDIM]], [[_PRESERVE]]
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* [[Arrays]], [[&B|_BIT arrays]]
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{{PageNavigation}}
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