# fsVarsAVarXYZSet<no value>
The **fsVarsAVarXYZSet** function can be used to set the value of a specific `AVar` stored as a three dimensional vector (including LLA).

 

##### Syntax

``` wasm
FsVarError fsVarsAVarXYZSet(
    FsAVarId aVarId,
    FsUnitId unitId,
    FsVarParamArray param,
    FsVec3d value,
    FsObjectId target
);
```

 

##### Parameters

<table><thead><tr class="header"><th>Parameters</th><th>Description</th></tr></thead><tbody><tr class="odd"><td><code>aVarId</code></td><td><p>The ID of an <code>AVar</code> (found using <code>fsVarsGetAVarId</code>).</p></td></tr><tr class="even"><td><code>unitId</code></td><td>The ID of a unit (found using <code>fsVarsGetUnitId</code>).</td></tr><tr class="odd"><td><code>param</code></td><td>A parameter which might be mandatory to access the <code>AVar</code> (in the case of an indexed <code>AVar</code>, for example). Elements in <code>param</code> can be <code>FsCrc</code>, <code>String</code> or <code>index</code>.</td></tr><tr class="even"><td><code>value</code></td><td>The new value of the <code>AVar</code>.</td></tr><tr class="odd"><td><code>target</code></td><td><p>The ID of the object from which the variable is being set.</p></td></tr></tbody></table>

 

##### Return Values

This function returns `FsVarError`, where 0 means there is no error (in which case, the value of the `AVar` has been set in `result`).

 

##### Example

``` wasm
FsUnitId unitId = fsVarsGetUnitId("feet per seconds");
FsAVarId aVarId = fsVarsGetAVarId("STRUCT WORLDVELOCITY");
FsVec3d newValue {-6, 0, 0};
if (fsVarsAVarXYZSet(aVarId, unitId, {}, newValue) == FS_VAR_ERROR_NONE)
{
    // valid
}
else
{
    // error
}
```