> ## 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.
# Swift Multi-line Comment
A multi-line comment in Swift is a lexical construct that instructs the compiler to ignore a specific block of text spanning one or more lines during the tokenization phase.
It is defined using a forward-slash followed by an asterisk (`/*`) as the opening delimiter, and an asterisk followed by a forward-slash (`*/`) as the closing delimiter. Any characters placed between these delimiters are treated as whitespace by the Swift compiler.
```swift theme={"dark"}
/*
This is a standard multi-line comment.
The Swift compiler will completely ignore
everything between the opening and closing delimiters.
*/
```
Unlike many C-family languages, Swift supports **nested multi-line comments**. The compiler tracks the depth of the comment blocks, requiring every opening delimiter (`/*`) to be matched with a corresponding closing delimiter (`*/`) before the standard parsing of source code resumes.
```swift theme={"dark"}
/*
Outer multi-line comment block initiated.
/*
Inner nested multi-line comment block.
The compiler increments the nesting depth here.
*/
The compiler decrements the nesting depth above,
but continues ignoring text until the outer block is closed.
*/
```
Because the compiler evaluates the nesting depth, an inner `*/` will not prematurely terminate the outer `/*`. The lexical analyzer will only resume standard token generation once the nesting depth returns to zero.
Tired of Poor Swift Skills? Fix That With Deep Grasping!
Learn More
