A neural network can be defined as a model of reasioning

based on the human brain.

The human brain incorporates nearly 10 billion neurons and

60 trillion connections,Synapses,between them.

By using multiple neurons simultaneously,the brain can

perform its functions much faster than the faster computers.

Although a single neuron has a very simple structure,an

army of such elements constitutes a tremendous processing

power.

The network which represents the connections among several

neurons is called a neural network.