FILEEXISTS: Difference between revisions
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(Created page with "{{DISPLAYTITLE:_FILEEXISTS}} The '''_FILEEXISTS''' function determines if a designated file name exists and returns true (-1) or false (0). {{PageSyntax}} : {{Parameter|theFileExists%}} = _FILEEXISTS({{Parameter|filename$}}) {{PageDescription}} * The {{Parameter|filename$}} parameter can be a literal or variable string value that can include a path. * The function returns -1 when a file exists and 0 when it does not. * The function reads the system inf...") |
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{{PageExamples}} | {{PageExamples}} | ||
''Example:'' Checks if a file exists before opening it. | |||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|IF}} {{Cl|_FILEEXISTS}}("mysettings.ini") THEN | {{Cl|IF}} {{Cl|_FILEEXISTS}}({{Text|<nowiki>"mysettings.ini"</nowiki>|#FFB100}}) {{Cl|THEN}} | ||
{{Cl|PRINT}} "Settings file found." | {{Cl|PRINT}} {{Text|<nowiki>"Settings file found."</nowiki>|#FFB100}} | ||
{{Cl|END IF}} | {{Cl|END IF}} | ||
{{CodeEnd | {{CodeEnd}} | ||
Latest revision as of 10:09, 29 March 2023
The _FILEEXISTS function determines if a designated file name exists and returns true (-1) or false (0).
Syntax
- theFileExists% = _FILEEXISTS(filename$)
Description
- The filename$ parameter can be a literal or variable string value that can include a path.
- The function returns -1 when a file exists and 0 when it does not.
- The function reads the system information directly without using a SHELL procedure.
- The function will use the appropriate Operating System path separators. _OS$ can determine the operating system.
- This function does not guarantee that a file can be accessed or opened, just that it exists.
Examples
Example: Checks if a file exists before opening it.
IF _FILEEXISTS("mysettings.ini") THEN PRINT "Settings file found." END IF |
See also