$io.exists

Examine a files existance.
Syntax
    $io{exists}{file_name}
    $io.exists{file_name}
DocumentationExamine a files existance.
    Parameters:
      exists, a flag to indicate that the existance of the specified file is to be examined.
      file_name, the name of the file whos existance is to be examined (see the note about the filename syntax at the end of this document).
    Returns:
      1 if and only if the specified file exists; 0 otherwise.
Examples
GroupSpecial
Minimum required transaction-mode:READ=IO
Required scripting permission of the developerPERMISSION_FL_BASIC
Minimum parameters1
Maximum parameters 1
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