How to insert while read into a function?

Question

I am trying to write a script in which there is a function that outputs the file line by line:

linePr (){ while read LINE; do echo $LINE; done < $1 }

In this case, the name or path to the file is entered in the first parameter of the script. However, at startup, the following error appears:

 ./program: 6: ./program: cannot open : No such file

The file exists and is properly formatted.

How to solve this problem?

Alexander, why do you give here the code of only one function from the whole of your script?

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