# virtual_map.len · Rell standard library · Chromia Docs (concept)

> pure function len(): integer Deprecated (for removal): Use 'size' instead Get the size (number of entries) of this map. Since 0.6.0 Alias of virtual_map.si

Source: https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/virtual_map/len/

FUNCTION

# virtual\_map.len

```signature
pure function len(): integer
```

**Deprecated** (for removal): Use 'size' instead

Get the size (number of entries) of this map.

Since 0.6.0

**Alias of** [virtual\_map.size](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/virtual_map/size/)

[View this page on docs.chromia.com](https://docs.chromia.com/pages/rell-stdlib/-rell%20-system%20-library/%5Broot%5D/virtual_map/len.html)Generated API reference, mirrored from the live docs