> ## Documentation Index
> Fetch the complete documentation index at: https://docs.syntblaze.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Dart Single-line Comment
A single-line comment in Dart is a lexical construct ignored by the Dart compiler, designed to embed non-executable text within the source code. It is initiated by the double forward-slash token (`//`).
During the tokenization phase, the Dart lexical analyzer discards all characters starting from the `//` token up to the immediate end-of-line (EOL) sequence. Dart recognizes a line feed (`\n`), a standalone carriage return (`\r`), or a carriage return followed by a line feed (`\r\n`) as valid line terminators.
**Syntax**
```dart theme={"dark"}
// This is a standalone single-line comment.
```
**Inline Placement**
A single-line comment can be appended to the end of a valid Dart statement. The compiler processes the executable statement and ignores the subsequent comment token along with its trailing text.
```dart theme={"dark"}
int counter = 0; // The comment begins here and ends at the line break.
```
**Lexical Behavior**
Because the lexical analyzer terminates the comment at the first line break, single-line comments cannot span multiple physical lines. Furthermore, any additional `//` tokens placed within an already initiated single-line comment are simply consumed as ignored raw text rather than nested comment tokens.
```dart theme={"dark"}
// This is a valid comment // with an ignored secondary token.
```
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