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# addAttribute(_:value:range:)

Adds an attribute with the given name and value to the characters in the specified range.

```
func addAttribute(_ name: NSAttributedString.Key, value: Any, range: NSRange)
```

## Parameters

`name`

A string specifying the attribute name. Attribute keys can be supplied by another framework or can be custom ones you define. For information about the system-supplied attribute keys, see the Constants section in [`NSAttributedString`](/documentation/Foundation/NSAttributedString).

`value`

The attribute value associated with `name`.

`range`

The range of characters to which the specified attribute/value pair applies.

## Discussion

You may assign any `name`/`value` pair you wish to a range of characters. Raises an [`invalidArgumentException`](/documentation/Foundation/NSExceptionName/invalidArgumentException) if `name` or `value` is `nil` and an [`rangeException`](/documentation/Foundation/NSExceptionName/rangeException) if any part of `range` lies beyond the end of the receiver’s characters.

---

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