What is Digital Computer?

Computers can be either digital or analog. Digital refers to the processes in computers that manipulate binary number( 0s or 1s), which represents switches that are turned on or off by the electrical current. Analog refers to numerical values that have a continuous range. Both 0 and 1 are analog numbers, but so is 1.5 or a number like π (approximately 3.14). As an example, consider a desk lamp. It is has a simple on/off switch, then it is digital because the lamp either produces light at a given moment or it does not. If a dimmer replaces the on/off switch, then the lamp is analog, because the amount of light can vary continuously from on to off and all intensities between.
The digital computer works by breaking data into digital form. Here the electronics flow in the form of electrical pulses. By digital we mean description of data which is stored or transmitted as a sequence of discrete symbols from a finite set, most commonly this means binary data represented using electronics or electromagnetic signals.
Digital computers operated by numerical counting (adding) of discrete data, using the method of controlled arithmetic. Analog computers set up an analogous to the numbers in the problem under consideration.
A digital computer represents the data into digits and then all operations are done these digits at extremely fast rates. The digital computer basically knows how to counts the digits.
In digital life we see digital electronics computer only When say only computers, then we mean digital electronic computers only.