# V8022\. A parameter is not used in a function or method\.

The analyzer has detected a parameter that has never been used in the body of a function or method\. 

The example:

```cpp
func cardHasLock(width int,     // <=
                 height int, 
                 xScale float64, 
                 yScale float64) {
 
    lockWidth := int(math.Round(float64(height) * xScale))
    lockHeight := int(math.Round(float64(height) * yScale))
    ....
}
```

The `height` parameter is used both when initializing the `lockHeight` variable and for `lockWidth`, which is a typo\. To initialize the `lockWidth` variable correctly, use the `width` parameter:

```cpp
lockWidth := int(math.Round(float64(width) * xScale))
```

The analyzer treats an unused parameter as acceptable and does not issue a warning in the following cases:

* the function or method is used as a value \(for example, as a callback\), where external code requires the parameter;
* the function or method is exported and must preserve its parameter list for backward compatibility;
* a specific interface strictly defines the parameter list;
* the function or method declares the parameter as a [blank identifier](https://go.dev/ref/spec#Blank_identifier);
* the function or method has an empty or trivial body;
* none of the function or method parameters are used;
* the file contains multiple functions or methods with similar unused parameters\.