For what purpose is a digital multimeter primarily used?

A digital multimeter is primarily used to measure voltage, current, and resistance in electrical circuits. This multifunctionality allows technicians and engineers to diagnose electrical problems, perform maintenance, and analyze circuit performance effectively. By measuring voltage, users can determine if a circuit has the correct potential difference; by measuring current, they can ensure that the flow of electricity is within expected parameters; and by measuring resistance, they can identify shorts or open circuits which could lead to equipment malfunction. This versatility makes the digital multimeter an indispensable tool in both educational and professional settings related to electricity and electronics.