---
title: n_un
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 10.8+]
path: kernel/nlist/1583921-n_un
---

# n_un

A union that holds an index into the string table, n_strx. To specify an empty string (""), set this value to 0. The n_name field is not used in Mach-O files.

## Declaration

```occ
union n_un;
```

## See Also

### Fields

- [n_type](kernel/nlist/1583961-n_type.md)
- [n_sect](kernel/nlist/1583924-n_sect.md)
- [n_desc](kernel/nlist/1583952-n_desc.md)
- [n_value](kernel/nlist/1583940-n_value.md)