What the function pushbutton?

A pushbutton is a simple electromechanical switch used to control an electrical circuit. When pressed, it completes the circuit, allowing current to flow and activating a device or function, like turning on a light or starting a machine. Pushbuttons are commonly found in various applications, including consumer electronics, industrial equipment, and control panels. They can come in various designs, including momentary (returning to the off position when released) or latching (staying in the on position until pressed again).