How to use Angular variable in expression?

I'm trying to do the following:

<div ng:repeat='row in _.range(0,{{rowCount}})'></div>

but it doesn't evaluate {{rowCount}}. What do I need to do to get it to evaluate?

The ngRepeat already evals the expression you pass it. You don't need - and really shouldn't - use {{}}. Just reference rowCount:

<div ng:repeat='row in _.range(0,rowCount)'></div>

And it should work!