What is the work of "# " ??

Answer 1

# stands for the preprocessor operator in c++, used to issue compiler specific commands which are then used in the code.

# simply indicates that the keywords and data being given is to be processed before the execution of the program is to be done.

Answer 2

In Java, it's an illegal character!

Answer 3

C and C++

headers

example:

#include <iostream>

Answer 4

# is actually use to call or redirect compiler. . its like a trigger of compiler