Comments in C++

Comments are explanatory statements that are included in programs. All programming languages allow for some form of comments. Comments in C++ starts with “//” these two forward slashes indicate that these are comments and C++ compiler will ignore these lines. Comments are used to help others understand that part of the code or they can be used to explain some point or function of that piece of code.
// This is a comment.
int a = 5; //initializing a’s value with 5

A comment can also start with /* and ends with the */ this is also used for multiline comments. For example
#include
using namespace std;

int main() {
         /*this program just
         Prints Hello World */
   cout << "Hello World";

   return 0;
}
While the code above is compiled by the compiler, it will ignore the anything written between /* */. And will print following line.
Hello World
Comments can also be nested as compiler is just going to ignore them. But remember if you are using /* you should also close the comment with */ otherwise all the code below will be considered as comment by the compiler. For example:

/* here is an example of // nested
Comments */

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