$fexist function


The $fexist function checks if the file or folder specified by path exists and returns a value < 0, 0, or > 0 depending on the result:

Path status Result
path exists and is a folder < 0
path does not exist 0
path exists and is a file > 0

The result can be used in conditional expressions; see Examples below.


All parameters may contain symbolic references; these are resolved before the function is applied. See Examples below.

Path of the file or folder whose existence must be checked. path may contain wildcards; in that case, the result reflects the type of the first matching file or folder.


Here are some usage examples for this function:

Returns > 0 if the Notepad.exe file exists; 0 if it does not; and < 0 if it is a folder (which is highly unlikely).
<$fexist(<TempFolder>\*.log)> <> 0
<$fexist(<TempFolder>\*.log)> > 0
All conditional expressions evaluate to TRUE if any .log files exist in the user's Temp folder. The first two also evaluate to TRUE if a .log folder exists; the third expression only evaluates to TRUE for proper files.
NOT <$fexist(<TempFolder>\*.log)>
Conditional expression that evaluates to TRUE if no .log files or folders exist in the user's Temp folder.