javascript - input name is an array of variables, how to splice it?

Question

$('input[name="cid[1]"]').val(data);//Assign display inventory code

This can be displayed normally, but it won't work if I modify the values ​​in the array into variables.

$('input[name="cid[$i]"]').val(data);//It cannot be displayed here

How to splice $i here?

Answer 1

$('input[name="cid[' + $i + ']"]').val(data);