---
title: second()
framework: healthkit
role: symbol
role_heading: Type Method
path: healthkit/hkunit/second()
---

# second()

Returns a HealthKit unit for measuring time in seconds.

## Declaration

```swift
class func second() -> Self
```

## Return Value

Return Value A HealthKit unit for measuring time in seconds.

## See Also

### Constructing time units

- [secondUnit(with:)](healthkit/hkunit/secondunit(with:).md)
- [minute()](healthkit/hkunit/minute().md)
- [hour()](healthkit/hkunit/hour().md)
- [day()](healthkit/hkunit/day().md)