The Size(file) command returns the size of a file in bytes.

If the file does not exist or an invalid file descriptor is passed, an exception is raised.

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{WriteFile}\right]\left(''file''\,''data''\right)$

$4$

$\mathrm{FileTools}\left[\mathrm{Size}\right]\left(''file''\right)$

$4$

$\mathrm{FileTools}\left[\mathrm{Remove}\right]\left(''file''\right)$