What does is error mean and how to solve it?

Question

fatal error: iostream.h: No such file or directory
#include<iostream.h>
^~~~~~~~~~~~
compilation terminated.

Answer 1

Because of the .h. Just do
#include <iostream> and it will work.

Answer 2

many pc Wil not support include <iostream.h> so just try by removing .h
and I guess you are trying in sololearn so remove .h