How to create empty text file from a batch file?

by 
copy NUL EmptyFile.txt

DOS has a few special files (devices, actually) that exist in every directory, NUL being the equivalent of UNIX’s /dev/null: it’s a magic file that’s always empty and throws away anything you write to it. Here’s a list of some others; CON is occasionally useful as well.

To avoid having any output at all, you can use

copy /y NUL EmptyFile.txt >NUL

/y prevents copy from asking a question you can’t see when output goes to NUL.

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