---
title: copysignl
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.10+]
path: kernel/1557294-copysignl
---

# copysignl

## Declaration

```occ
long double copysignl(long double, long double);
```

## See Also

### Copy Sign

- [copysign](kernel/1557306-copysign.md)
- [copysignf](kernel/1557234-copysignf.md)