A rice cooker, as the name suggests, is an appliance used to cook rice. It uses the combination of heat and intense pressure of steam to do its job. It’s a cylindrical-shaped appliance consisting of a thermostat, a cooking bowl, and a heat source. It makes the water reach the boiling point to produce steam.
This pressurized steam is solely responsible for the cooking of rice in your rice cooker. It’s a straightforward thing designed to boil water until all of it gets absorbed by the food.