appendfile

appendfile appends string content to the end of a file at the specified path. If the file does not exist, it will be created.

This is useful for logging, accumulating data over time, or extending file contents without overwriting them.

Blocked file extensions

appendfile must reject paths whose extension is listed in the Filesystem security restrictions.

function appendfile(path: string, contents: string): ()

Parameters

Parameter	Description
path	The file path to append to.
contents	The string content to add to the file.

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Example

writefile("file4.txt", "print(")
appendfile("file4.txt", "'Hello')")
print(readfile("file4.txt")) -- Output: print('Hello')