Comments

Syntax#

// Single-line comment
/* Multi-line/In-line comment */
/// Dartdoc comment

Remarks#

It is good practice to add comments to your code to explain why something is done or to explain what something does. This helps any future readers of your code to more easily understand your code.

End of Line Comment

Everything to the right of // in the same line is commented.

int i = 0; // Commented out text

Multi-Line Comment

Everything between /* and */ is commented.

void main() {
  for (int i = 0; i < 5; i++) {
    /* This is commented, and
    will not affect code */
    print('hello ${i + 1}');
  }   
}

Documentation using Dartdoc

Using a doc comment instead of a regular comment enables dartdoc to find it and generate documentation for it.

/// The number of characters in this chunk when unsplit.
int get length => ...

You are allowed to use most markdown formatting in your doc comments and dartdoc will process it accordingly using the markdown package.

/// This is a paragraph of regular text.
///
/// This sentence has *two* _emphasized_ words (i.e. italics) and **two**
/// __strong__ ones (bold).
///
/// A blank line creates another separate paragraph. It has some `inline code`
/// delimited using backticks.
///
/// * Unordered lists.
/// * Look like ASCII bullet lists.
/// * You can also use `-` or `+`.
///
/// Links can be:
///
/// * https://www.just-a-bare-url.com
/// * [with the URL inline](https://google.com)
/// * [or separated out][ref link]
///
/// [ref link]: https://google.com
///
/// # A Header
///
/// ## A subheader