What is the significance and use of # symbol in c++ and what does it stands for .

Question

the # symbol used in #include<iostream>
what is # here

Answer 1

https://www.sololearn.com/learn/CPlusPlus/1603/
Also you can see the comments in the lesson

Answer 2

The # symbol indicates preprocessor directives. The preprocessor modifies the source file before handling it to the compiler. You usually use them for macros or including other files