# Method Calls

Zaidlang is deeply object oriented, so most code consists of invoking methods on objects, usually something like this:

```dart
dog.speak("Throw the ball!")
```

You have a *receiver* expression (here `dog`) followed by a `.`, then a name (`speak`) and an argument list in parentheses (`("Throw the ball!")`). Multiple arguments are separated by commas:

```dart
dog.command("fetch", "ball")
```

The argument list can also be empty:

```dart
dog.sit()
```

Zaidlang executes a method call like so:

1. Evaluate the receiver and arguments from left to right.
2. Look up the method on the receiver's object.
3. Invoke it, passing in the argument values.