Artificial Intelligence or AI is a domain that is based on the principle that human intelligence can be redefined in a method that a machine or robot can easily imitate the intelligence and executes some tasks (learning and problem solving) from the most troublesome situation. 

Here two types of learning are widely used, one is for raw data (Unsupervised learning) another is for structured data (Supervised learning).

Again, AI is not only limited to human intelligence, it includes many other things also, i.e. nature inspired and bio-inspired algorithms. Namely, Evolutionary computing, Artificial Neural computing, Swarm Intelligence, Cognitive computing, etc.