---
title: "subscript(_:)"
framework: swift
role: symbol
role_heading: Instance Subscript
path: "swift/array/subscript(_:)-dplx"
---

# subscript(_:)

Returns the first metric whose Metric/name equals the given metric’s name, or nil if not found.

## Declaration

```swift
subscript(metric: Metric) -> Metric? { get }
```