# str Obj::raceStrPrefLow()

[Family: Obj](/imperivm/en/CKS/familias/obj/)

## Exact signature

```text
str Obj::raceStrPrefLow()
```

## Description

Returns the civilization prefix in lowercase, or an empty string for an invalid value.

## Parameters and return type

**Return type:** `str`

The member is called on an object. Its receiver is not repeated among this signature’s arguments.

This signature takes no additional arguments.

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