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(Created page with "The ERROR statement is used to simulate a program error or to troubleshoot error handling procedures. {{PageSyntax}} : ERROR {{Parameter|codeNumber%}} {{PageDescription}} * Can be used to test an error handling routine by simulating an error. * Error code 97 can be used to invoke the error handler for your own use, no real error in the program will trigger error 97. * Use error codes between 100 and 200 for custom program errors that will not be responded to...") |
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{{PageDescription}} | {{PageDescription}} | ||
* Can be used to test an error handling routine by simulating an error. | * Can be used to test an error handling routine by simulating an error. | ||
* Error code 97 can be used to invoke the error handler for your own use, no real error in the program will trigger error 97. | * Error code 97 can be used to invoke the error handler for your own use, no real error in the program will trigger error 97. | ||
* Use error codes between 100 and 200 for custom program errors that will not be responded to by QB64. | * Use error codes between 100 and 200 for custom program errors that will not be responded to by QB64. | ||
{{PageExamples}} | {{PageExamples}} | ||
''Example:'' Creating custom error codes for a program that can be handled by an [[ON ERROR]] handling routine. | ''Example:'' Creating custom error codes for a program that can be handled by an [[ON ERROR]] handling routine. | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|ON ERROR}} {{Cl|GOTO}} handler | {{Cl|ON ERROR}} {{Cl|GOTO}} handler | ||
| Line 27: | Line 27: | ||
{{Cl|PRINT}} {{Cl|ERR}}, {{Cl|_ERRORLINE}} | {{Cl|PRINT}} {{Cl|ERR}}, {{Cl|_ERRORLINE}} | ||
{{Cl|BEEP}} | {{Cl|BEEP}} | ||
{{Cl|RESUME}} {{Cl|NEXT}} | {{Cl|RESUME}} {{Cl|NEXT}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
: '''Note: Don't use error codes under 97 or over 200 as QB64 may respond to those errors and interrupt the program.''' | : '''Note: Don't use error codes under 97 or over 200 as QB64 may respond to those errors and interrupt the program.''' | ||
| Line 33: | Line 33: | ||
{{PageSeeAlso}} | {{PageSeeAlso}} | ||
*[[ON ERROR]] | *[[ON ERROR]] | ||
*[[ERR]], [[ERL]] | *[[ERR]], [[ERL]] | ||
*[[_ERRORLINE]] | *[[_ERRORLINE]] | ||
*[[ERROR Codes]] (list) | *[[ERROR Codes]] (list) | ||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 01:34, 23 January 2023
The ERROR statement is used to simulate a program error or to troubleshoot error handling procedures.
Syntax
- ERROR codeNumber%
Description
- Can be used to test an error handling routine by simulating an error.
- Error code 97 can be used to invoke the error handler for your own use, no real error in the program will trigger error 97.
- Use error codes between 100 and 200 for custom program errors that will not be responded to by QB64.
Examples
Example: Creating custom error codes for a program that can be handled by an ON ERROR handling routine.
ON ERROR GOTO handler IF x = 0 THEN ERROR 123 x = x + 1 IF x THEN ERROR 111 END handler: PRINT ERR, _ERRORLINE BEEP RESUME NEXT |
- Note: Don't use error codes under 97 or over 200 as QB64 may respond to those errors and interrupt the program.
See also
- ON ERROR
- ERR, ERL
- _ERRORLINE
- ERROR Codes (list)