Is it possible that text file be used as input of batch file?

Say I had this in a text file:

file.txt

Is it possible to import this into a batch file, not just being type on screen but being used as a command? I thought maybe开发者_开发技巧 something like this:

%input% < file.txt

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this reads the first line from a Textfile into a variable:

set /p Input=<file.txt

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You'll have to use the "more" command to check the contents of the text file.