Google maps V3 API key usage

Question

Sounds stupid, but since there is no specific example in documentation, its not clear how to use the api key.
This part of code from documentation is not clear:

<script type="text/javascript"
      src="https://maps.googleapis.com/maps/api/js?key={API_KEY}&sensor=SET_TO_TRUE_OR_FALSE">
    </script>

Well I will find my apikey, let's say that the value of my api key will be for example: 123456ABCDEFG

So how should I used it?

1)src="https://maps.googleapis.com/maps/api/js?key={123456ABCDEFG}&sensor=false"
or
2)src="https://maps.googleapis.com/maps/api/js?key=123456ABCDEFG&sensor=false"
or else?

Answer 1

Don't forget the equals.

src="https://maps.googleapis.com/maps/api/js?key=123456ABCDEFG&sensor=false"