---
title: "init(attoseconds:)"
framework: swift
role: symbol
role_heading: Initializer
path: "swift/duration/init(attoseconds:)"
---

# init(attoseconds:)

Construct a Duration from the given number of attoseconds.

## Declaration

```swift
init(attoseconds: Int128)
```

## Parameters

- `attoseconds`: The total duration expressed in attoseconds.

## Discussion

Discussion This directly constructs a Duration from the given number of attoseconds. let d = Duration(attoseconds: 1_000_000_000_000_000_000) print(d) // 1.0 seconds