In a very general way, it can be said that the advantages of the digital computer compared to the analog computer,I are its greater flexibility and precision, while its disadvantages are its higher cost and complexity.
Information storage can be easier in digital computer systems than in analogue ones. New features can often be added to a digital system more easily too.
The main disadvantages are that digital circuits use more energy than analogue circuits to accomplish the same tasks, thus producing more heat as well. Digital circuits are often fragile, in that if a single piece of digital data is lost or misinterpreted, the meaning of large blocks of related data can completely change.
Digital computers play an important role in life today as they can be used to control industrial processes, analyse and organize business data, assist in scientific research and designing of automobiles and aircraf, and even help making special effects in movies.