CLEAR: Difference between revisions
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(Created page with "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 array values where numerical values become zero and string values become empty (""). * It does not clear constant values. * Closes all opened files. * $DYNAMIC...") |
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{{PageExamples}} | {{PageExamples}} | ||
''Example:'' Using CLEAR to clear array elements from [[STATIC|static]] arrays or arrays created using [[DIM]]. | ''Example:'' Using CLEAR to clear array elements from [[STATIC|static]] arrays or arrays created using [[DIM]]. | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|CLS}} | {{Cl|CLS}} | ||
{{Cl|DIM}} array(10) 'create a {{Cl|$STATIC}} array | {{Cl|DIM}} array(10) 'create a {{Cl|$STATIC}} array | ||
| Line 25: | Line 25: | ||
{{Cl|CLEAR}} | {{Cl|CLEAR}} | ||
{{Cl|PRINT}} array(5) | {{Cl|PRINT}} array(5) | ||
{{CodeEnd}} | {{CodeEnd}} | ||
:''Note:'' If you change DIM to REDIM a "Subscript out of range" error will occur because a [[$DYNAMIC]] array is removed by CLEAR. | :''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}} | {{PageSeeAlso}} | ||
* [https://qb64phoenix.com/forum/showthread.php?tid=1223 Featured in our "Keyword of the Day" series] | |||
* [[ERASE]] | * [[ERASE]] | ||
* [[REDIM]], [[_PRESERVE]] | * [[REDIM]], [[_PRESERVE]] | ||
* [[Arrays | * [[Arrays]] | ||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 22:20, 18 June 2024
The CLEAR statement clears all variable and array element values in a program.
Syntax
- CLEAR [, ignored& , ignored&]
Description
- All parameters are optional and ignored by QB64.
- Normally used to clear all program variable and array values where numerical values become zero and string values become empty ("").
- It does not clear constant values.
- Closes all opened files.
- $DYNAMIC or REDIM arrays will need to be redimensioned or an error will occur when referenced because they are removed.
Examples
Example: Using CLEAR to clear array elements from static arrays or arrays created using DIM.
CLS DIM array(10) 'create a $STATIC array array(5) = 23 PRINT array(5) CLEAR PRINT array(5) |
- Note: If you change DIM to REDIM a "Subscript out of range" error will occur because a $DYNAMIC array is removed by CLEAR.
See also