How to check if a file is not empty in Batch

Question

There are several ways google throws at me for checking if a file is empty but I need to do the opposite.

If (file is NOT empty)

do things

How would I do this in batch?

Answer 1

for /f %%i in ("file.txt") do set size=%%~zi
if %size% gtr 0 echo Not empty

Answer 2

this should work:

for %%R in (test.dat) do if not %%~zR lss 1 echo not empty

help if says that you can add the NOT directly after the if to invert the compare statement