What is stream?

Answer 1

A stream represents a sequence of elements and supports different kind of operations to perform computations upon those elements.
Stream operations are either intermediate or terminal.

Answer 2

it is the flow of data from one place to another place like form keyboard to memory, memory to file ,from keyboard to file
when you give input to the program through keyboard that is handled by the input stream

Answer 3

Es un enlace o canal... algo así como un hipervínculo; te dirige a otros datos