Microprogramming (i.e. writing microcoe) is a method that can be employed to implement machine instructions in a CPU relatively easily, often using less hardware than with other methods. It is a set of very detailed and rudimentary lowest-level routines which controls and sequences the actions needed to execute (perform) particular instructions, sometimes also to decode (interpret) them. A machine instruction implemented by a series of microinstructions is thus loosely comparable to how an interpreter implements a high-level language statement using a series of machine instructions.