ERROR: Difference between revisions

Revision as of 17:30, 19 April 2022

The ERROR statement is used to simulate a program error or to troubleshoot error handling procedures.

ERROR codeNumber%

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.

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.

@@ Line 15: / Line 15: @@
 ''Example:'' Creating custom error codes for a program that can be handled by an [[ON ERROR]] handling routine.
 {{CodeStart}} '' ''
-{{C1|ON ERROR}} {{Cl|GOTO}} handler
+{{Cl|ON ERROR}} {{Cl|GOTO}} handler
 {{Cl|IF...THEN|IF}} x = 0 {{Cl|THEN}} {{Cl|ERROR}} 123