---
title: "nanoseconds(_:)"
framework: swift
role: symbol
role_heading: Type Method
path: "swift/duration/nanoseconds(_:)-1cg32"
---

# nanoseconds(_:)

Construct a Duration given a number of nanoseconds as a Double by converting the value into the closest attosecond scale value.

## Declaration

```swift
static func nanoseconds(_ nanoseconds: Double) -> Duration
```

## Return Value

Return Value A Duration representing a given number of nanoseconds.

## Discussion

Discussion   let d: Duration = .nanoseconds(382.9)