How can I set conditional formatting for a row when the value in the first
cell of the row contains data? I have tried the following formulas, and
neither does anything, even when it's the only conditional formatting.

=($A1<"")
=(A1<"")

Thanks to your help to other people on formatting every other row, I am able
to format rows 4,8,12, ... one color, and rows 2,6,10 another color. By
playing around, I found that the formatting occurs when the value is TRUE or
1, so I don't understand why one of the above formulas doesn't work.
Thank you.