> For the complete documentation index, see [llms.txt](https://max-daunarovich.gitbook.io/flow-network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://max-daunarovich.gitbook.io/flow-network/introduction/comments.md).

# Comments

Comments can be used to document code. A comment is text that is not executed.

*Single-line comments* start with two slashes (`//`). These comments can go on a line by themselves or they can go directly after a line of code.

```
// This is a comment on a single line.
// Another comment line that is not executed.

let x = 1  // Here is another comment after a line of code.
```

*Multi-line comments* start with a slash and an asterisk (`/*`) and end with an asterisk and a slash (`*/`):

```
/* This is a comment which
spans multiple lines. */
```

Comments may be nested.

```
/* /* this */ is a valid comment */
```

Multi-line comments are balanced.

```
/* this is a // comment up to here */ this is not part of the comment */
```