--Originally published at how not to program

Here is a code of how to use comments

#include <iostream>

using namespace std;
// Add a Double “//” then just type. The program will ignore the text after the “//”
int main()
{
cout << “Hello world!” << endl;
// No matter where in the code it is

/* you can also use “/*” to start a coment but you need to close it just like a parenthesis with “* /” */

return 0;

}