Insert text before and after numeric entry in a grid

Question

I have a grid, column based, set as a constant sum.  I am adding text after the numeric entry box and also need to add text before it.  I know how to do this on a per row basis, but not sure how to write this to apply to all 101 rows that can come up.
This is what I have:

<script>
    $(document).ready(function() {
        $("#Q15_r1_c1").before("$");
    });
</script>

Answer 1

I realized what I was doing wrong.  I was using dot notation instead of +.  This seems to be working:

<script>
    $(document).ready(function() {
for (var i = 1; i <= 101; i++) {
$("#Q15_r" + i + "_c1").before("$");
}
    });
</script>