Questoin from c++

C++
#1

why we use #include iostream in source code?

#2

#include tells the compiler to pull in the contents of the headeriostream. That header provides, among other things, declarations of the objects std::cinandstd::cout`. So the basic “Hello, world” program looks like this:

#include
int main() {
std::cout << “Hello, world\n”;
return 0;
}

1 Like
#3

To call predefined function available in library.

#4

iostream is the header file which contains cout and cin and many other command.

#5

we use #include<iostream.h> because it store the input and output.