---
title: index
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlargumentdescriptor/index
---

# index

The index ID of the argument.

## Declaration

```swift
var index: Int { get set }
```

## See Also

### Setting the descriptor’s properties

- [dataType](metal/mtlargumentdescriptor/datatype.md)
- [access](metal/mtlargumentdescriptor/access.md)
- [arrayLength](metal/mtlargumentdescriptor/arraylength.md)
- [constantBlockAlignment](metal/mtlargumentdescriptor/constantblockalignment.md)
- [textureType](metal/mtlargumentdescriptor/texturetype.md)