Open the door and take a look. You know for sure you have a broiler function in your oven if one of the control knobs has a BROIL setting.
The heating element that heats the oven for baking and roasting is either on the floor of the oven compartment if it's electric or just under the floor if it's gas.
The broiler is a separate element (usually) at the top of the same oven compartment.
In some old stoves, there is one heating element under the floor of the oven compartment. It serves the dual purpose of heating the oven above and, via a pull out drawer under the main oven compartment, to act as the broiler element as well.