---
title: nanl
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.10+]
path: kernel/1557311-nanl
---

# nanl

## Declaration

```occ
long double nanl(const char *);
```

## See Also

### Not a Number

- [nan](kernel/1557310-nan.md)
- [nanf](kernel/1557309-nanf.md)