Why do we namespace std why not <conio.h>?? And what does namespace std implies??

Answer 1

According to me conio. h is use so that we use clrscr ( clear the screen) and getch() in program

Answer 2

conio.h is not a standard library .It is extension of Borland compilers.
using namespace std means std namespace will be use
https://www.tutorialspoint.com/cplusplus/cpp_namespaces.htm

Answer 3

using namespace std tells the compiler that we want to search for objects and methods in std namespace. Without this you would write std:: before each object in standard template library.

Answer 4

i want to know that about too.

Answer 5

using namespace std include features c++ library whereas conio.h is not in c++ library but in the c library