elviscai

I know how to write a file, but want to decide what to write to the file based on whether the file exists or not.

I want to start a workflow with a hotkey, then check if the specified filename exists, and create the file if it doesn't exist, and append the content if it does. After reading the help, I feel the "File Utility" is what I want - but I don't know how to pass the filename to it? I hope I can get an example or an answer, thanks!