Please tell me......Why to use <iostream> while I had learned to use <iostream.h> for any program tell me some more.

Question

about its proper use how to? ??

Answer 1

<iostream.h> is part of the pre-standard C++, used in obsolete compilers such as in Turbo C++. Please read:

https://www.sololearn.com/Discuss/288609/?ref=app

Answer 2

new version of c++ compiler uses iostream

while older version uses iostream.h