why we use <iostream> . What is the meaning

Question

answer to make me understand

Answer 1

iostream is used for standard input & output. If your code needs input or output, you include iostream. Otherwise, you do not really need to. But since output is needed for most of C++ programs, iostream is included in many C++ programs.

Answer 2

have you even taken up any c++ courses?
please first try to find out by your self then take helps.
if i m not wrong this things are the first things to be taught in any c++ course and i know i am not wrong.
Try to take up C++ course here at sololearn it will cleared up your basics all the best!