How do i render a bezier curve ?

i tried the render resolution in the curve and surface panel but it still doesnt render ? do i have to press any other button ?

By default, a Bezier Curve has no width or height. Use either the Extrude or Bevel Depth buttons on the Editing panel (F9) to give it some dimension.

or bevel object. http://wiki.blender.org/index.php/Manual/Curves#Bevel_and_Taper_Objects

A Bezier curve is a two-dimensional object: an infinitely-slender string.

The only thing that can be rendered is a three-dimensional surface.

There are many ways to do this. You can, for example, turn it into “a tube of toothpaste” as many tutorials will show you how to do.