What is the work of iostream in c++

Question

what is the one to another stream.

Answer 1

The I/O stream header is responsible for transferring streams of data to the output console.
It also defines a way of receiving input through a console
As its name suggests
I -> Input
O -> Output
Stream -> data streams.
Without the header "iostream", you can't receive input or print output

Answer 2

Ya'iko
stdio.h/cstdio still exist with scanf and printf related functions, without iostream.

Answer 3

That's because C++ covers the entire C language.
So any C code works well for C++