difference between include <iostream> vs <iostream.h>

Question

Hi all,
can someone share difference between iostream and Iostream.h.

When written in include statement does above make any difference

Answer 1

It may fail to compile due to simple lack of the header. ... iostream.h is deprecated by those compilers that provide it, iostream is part of the C++ standard. To clarify explicitly there is no mention of iostream.h at all in the current C++ standard

Answer 2

.h is the extension of header file.. for ansi we are using <iostream> and for turbo <iostream.h> ... its depend upon compiler... bt both are valid

Answer 3

.h is the extension of header file so we have to use it,without it you can't compile the program

Answer 4

As far as i know, iso c++ 2011 standard template library (STL) header files not using .h extension. In the past many compiler support stl .h extension.

Answer 5

iostream.h is not a part of the ISO C++ standard, iostream contains std namespace where as iostream. h does not. The only .h headers in C++ are those inherited from C like the stdio.h.
The C++ standard library is guaranteed to have 18 standard headers from the C language. These headers come in two standard flavors, <cxxx> and <xxx.h> (where xxx is the basename of the header, such as stdio, stdlib, etc). These two flavors are identical except the <cxxx> versions provide their declarations in the std namespace only, and the <xxx.h> versions make them available both in std namespace and in the global namespace. The committee did it this way so that existing C code could continue to be compiled in C++. However the <xxx.h> versions are deprecated, meaning they are standard now but might not be part of the standard in future revisions.

Answer 6

I think we can compile using only #include<iostream> because it's an namespace standard but while using the above statement we have to include using namespace std;