I do not want to discuss about C++ or any programming language!I just want to know what am i doing wrong with linux ubuntu about compiling helloworld.cpp!

I am learning C++ so my steps are:

open hello.cpp in vim and write this

#include <iostream.h>

int main()

{

    cout << "Hello World!

";`

    return 0;

}

So, after that i tried in the terminal this

g++ hello.cpp

AND the output is

hello.cpp:1:22: fatal error: iostream.h: No such file or directory

compilation terminated.

What do you suggest? Any useful step by step guide for me?Thanks!