What is the main function of a printer?

The main function of a printer is to print the results of data processing. Printers take digital information from a computer or other devices and produce physical copies on paper or other media, effectively turning data into a tangible format that can be read or used. This process is essential in various applications, from producing documents and photographs to creating labels and forms, highlighting the printer's role as a crucial component in the flow of information from digital to physical form. Printers operate based on data sent from the computer, allowing users to output the information they need in a visual, hard-copy format.

The other choices refer to different functions that are not related to printing; for example, producing audio output pertains to speakers or audio systems, converting digital images into analog signals is connected to media transmission methods rather than printing, and scanning documents involves digitalizing physical content rather than producing printed copies.