Comments in Dart Programming

Comments are a set of commands that are ignored by the compiler. They are used in a scenario where you want to attach a note to your code or a section of code so that when you visit it later, you can recall it easily.

The comment statements are usually ignored during the execution of the program.

There are multiple types of comments in Dart, mainly these are −

• Single line comments

• Multi-line comments

• Documentation comments

We will explore all the above document types in this article.

Single Line comments

Single line comments make use of // (double forward slash). They extend up to a new line character.

Syntax

// this is a comment

Example

 Live Demo

void main(){
   // var x = 10;
   print("Hello World");
}

Output

Hello World

Multi-line comment

A multi-line comment makes use of /* */. Everything put between the opening /* and the closing */ will be ignored by the compiler.

Syntax

/*
   Inside comment
   Also inside comment
*/

Example

 Live Demo

void main(){
   /*
   multi
   line
   comment
   */
   print("Hello World");
}

Output

Hello World

Documentation Comment

The documentation comment is used in cases where we are generating reference for a project or software package.

Syntax

/// This
/// is
/// a
/// documentation
/// comment