3 Now that we have some functions, it's a good idea to learn about comments.
4 Comments are notes that you leave to other programmers to help explain things
5 about your code. The compiler mostly ignores them.
7 Rust has two kinds of comments that you should care about: *line comments*
11 // Line comments are anything after '//' and extend to the end of the line.
13 let x = 5; // this is also a line comment.
15 // If you have a long explanation for something, you can put line comments next
16 // to each other. Put a space between the // and your comment so that it's
20 The other kind of comment is a doc comment. Doc comments use `///` instead of
21 `//`, and support Markdown notation inside:
24 /// `hello` is a function that prints a greeting that is personalized based on
29 /// * `name` - The name of the person you'd like to greet.
34 /// let name = "Steve";
35 /// hello(name); // prints "Hello, Steve!"
37 fn hello(name: &str) {
38 println!("Hello, {}!", name);
42 When writing doc comments, adding sections for any arguments, return values,
43 and providing some examples of usage is very, very helpful. Don't worry about
44 the `&str`, we'll get to it soon.
46 You can use the [`rustdoc`](../rustdoc.html) tool to generate HTML documentation
47 from these doc comments.