---
title: nanosecond
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/datecomponents/nanosecond
---

# nanosecond

A nanosecond or count of nanoseconds.

## Declaration

```swift
var nanosecond: Int? { get set }
```

## Discussion

Discussion note: This value is interpreted in the context of the calendar in which it is used.

## See Also

### Accessing Hours and Seconds

- [hour](foundation/datecomponents/hour.md)
- [minute](foundation/datecomponents/minute.md)
- [second](foundation/datecomponents/second.md)