They have a lot more patience that we humans do. Tell the computer to do it a hundred times, and it won't even blink. Pointers Using references, we can give multiple names to the same object. Pointers give us power to create complex data structures. They also increase our ability to shoot ourselves in the foot.
Pointer is like a plug that can be plugged into a jack.
If you have too many plugs and too many jacks, you may end up with a mess of tangled cables. A programmer has to strike a balance between creating a program that looks like a breadboard or like a printed circuit. Polymorphism Polymorphic means multi-shaped . You can plug your earphones into it and listen to music no matter whether it came as a modulation of a carrier wave, a set of magnetic domains on a tape or a series of pits in the aluminum substrate on a plastic disk.