Comments

Comments are a way to document code for other people, and yourself. In C++ there are two types of comments, single line and multi-line. We've seen single line comments in many of the previous examples but to reiterate, a single line comment is started with // and any text written after it until a newline is ignored by the compiler.

// Comment on its own line

auto const x = 5; // Comment

Multi-line comments are specified using /* */ quoting ie. the comment extends from /* comment opener and continues until */. This allows comments to extend multiple lines or be nested amongst code (if you really want).

/*
multi-line comment
another line
*/

auto const /* int */ x = 5;