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| operator | file...exists | ||||||||
Return type: Boolean Returns true if the named file exists and false otherwise.
Returns:
Syntax
file string-expression exists
An operator that tests whether a named file exists. Useful for avoiding overwriting a file that already exists with a new one.
For example, the following shows how a file...exists test can be used to avoid overwriting an existing file:
global stream error-strm
...
do when file "errors.log" exists
put #error "File errors.log already exists.%n"
put #error "Please delete or rename it before running this program.%n"
halt with 1
else
open error-strm as file "errors.log"
done
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Related Concepts File tests Security considerations |
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