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# Accessing Indicies Within an Attributed Substring

## Topics

### Accessing Terminal Indices

[`var startIndex: AttributedString.Index`](/documentation/Foundation/AttributedSubstring/startIndex)

The position of the first character in a nonempty attributed substring.

[`var endIndex: AttributedString.Index`](/documentation/Foundation/AttributedSubstring/endIndex)

A substring’s past-the-end position — the position one greater than the last valid subscript argument.

### Accessing Indices by Offset

### Accessing Indices Before a Known Position

### Accessing Indices After a Known Position

### Supporting Types

[`struct Index`](/documentation/Foundation/AttributedString/Index)

A type that represents the position of a character or code unit within an attributed string.


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