Inputs and outputs in a cooker?

In a cooker, the primary input is electrical energy or gas, which generates heat. This heat is transferred to the cooking medium, typically water or oil, along with the food items placed inside. The output includes the prepared food, which has undergone cooking processes such as boiling, steaming, or frying, and sometimes waste gases or steam, depending on the cooking method used. Additionally, the heat may also be considered an output, as it dissipates into the environment.