Comments
From cppreference.com
Comments are text blocks that are not interpreted by the compiler. Comments are used to provide additional information that can not be easily expressed in code. They are a good way to leave notes about why the code is written as it is, since even a single programmer tends to forget things. Comments are indispensable in large programmer teams.
There are two ways to declare a comment block in C++:
- Single-line comment. The compiler always ignores everything after
//
till the end of a line. - Multi-line comment. The compiler always ignores everything between
/*
and*/
. Be sure that the comment itself does not contain*/
, because this would cause the compiler to end the comment prematurely and probably emit a compilation error, since the rest of the comment is usually not proper C++.
The following example demonstrates the usage of comments in the "Hello world!" program:
Run this code
/* Hello world example This comment spans several lines */ #include <iostream> int main() /* This comment spans part of a line */ { std::cout << "Hello World!\n"; // till the end of the line return 0; }
Output:
Hello World!