rgb value as variable

Question

How do I store a variable value in a rgb() ? I use this code which isn't working:

<script>
var R=200;
var colval="rgb(R,10,100)";
</script>

I want it to be like this:

<script>
var colval="rgb(200,10,100)";
</script>

but somehow it doesn't store R right , putting quotes around 200 or R isn't working either.

Answer 1

I assume you're using JavaScript:

<script>
    var R = 200;
    var colval = "rgb(" + R + ",10,100)";
</script>

Results in colval = rgb(200,10,100)