## Practical Example

Below is a practical example illustrating the definition and invocation of a function in AVAP™:

### Definition of a Function to Calculate the Area of a Circle

```javascript
function calculate_circle_area(radius){
              return(3.14 * radius ** 2)
          }`
          
    }
```

### Calling the Function

```javascript
{`circle_radius = 5
              area = calculate_circle_area(circle_radius)
              result = "The area of the circle is: %s" % area
              addResult(result)
```

### Output:

```javascript
The area of the circle is: 78.5
```
