what is artificial neural network?

Artificial Neural Network (ANN) is the most important tool in Machine learning. It is an information processing model based on the structure of biological neural networks. Neural networks (NN) represent both the input & output layer, as well as a hidden layer containing units that transforms the input layer to output layer so that output layer can use the value. Artificial Neural Networks are considered as nonlinear statistical data modeling tools, these tools are used for finding patterns which are numerous & complex for programmers to retrieve and train the machine to recognize patterns.