What is InputStream & Output Stream? Why and when do we use them?

Question

Someone explain to me what InputStream and OutputStream are?

I am confused about the use cases for both InputStream and

Answer 1

Stream: In laymen terms stream is data , most generic stream is binary representation of data.

Input Stream : If you are reading data from a file or any other source , stream used is input stream. In a simpler terms input stream acts as a channel to read data.

Output Stream : If you want to read and process data from a source (file etc) you first need to save the data , the mean to store data is output stream .