# llIsFriend

*LSL function*

```lsl
integer integer llIsFriend(key agent_id);
```

- `key agent_id`: UUID of the agent to check.

- Returns: `integer`
- Energy: 10

Returns an [integer](https://wiki.secondlife.com/wiki/integer) that is [TRUE](/constants/TRUE/) if **agent_id** and the owner of the [prim](https://wiki.secondlife.com/wiki/prim) the [script](https://wiki.secondlife.com/wiki/Script) is in are friends, otherwise [FALSE](/constants/FALSE/).

```lsl title="How to use" frame="terminal"
integer result = llIsFriend(NULL_KEY);
```

## Specification

- If the prim is owned by a group this function behaves identically to [llSameGroup](/functions/llSameGroup/)
- This function will return [FALSE](/constants/FALSE/) under the following edge cases:
- If neither the owner, nor the target agent are in the region.
- If the **agent_id** does not specify an agent.

## Caveats

- You are not your own friend.

## Examples

<details open>
<summary>Example 1</summary>

```lsl collapse={1-11}
default
{
    state_entry()
    {
        llSensorRepeat("", NULL_KEY, AGENT, 95, PI, 10);
    }

    sensor(integer count)
    {
        integer index;
        for (index = 0; index < count; ++index)
        {
            string is_is_not = " is NOT ";
            if (llIsFriend(llDetectedKey(index)))
            {
                is_is_not = " is ";
            }
            llSay(0, llDetectedName(index) + is_is_not + "a friend.");
        }
    }
}
```

</details>

## See also

### Functions

- [llDetectedGroup](/functions/llDetectedGroup/)
- [llSameGroup](/functions/llSameGroup/)

---

*Source: [LlIsFriend](https://wiki.secondlife.com/wiki/LlIsFriend) on the Second Life Wiki. Content from the Second Life Wiki articles LlIsFriend (revision 1218389, 2025-08-02) and Template:LSL Function/uuid (revision 1195911, 2015-03-21), CC BY-SA 3.0.*

---

From lsl.dev: https://lsl.dev/functions/llIsFriend/