why are we using # include , what its mean ?

Answer 1

see "#" is a preprocessor directive which means that anything that comes with # will be processed before compiling and "include" is basically the name of a folder where all header files are present so #include will basically include the code of the the header file that you specify before compiling your program.

Answer 2

#include is predefine function

Answer 3

actually #include is used in c++. C# uses the "using" keyword. (but Rajat is still right, it is to use predefined functions)

Answer 4

@Sundar it is called a "directive" not "director"......i just googled it to see if i was confused but sry m not.....maybe u shud Google it too😅