AngularJS expressions are written inside double braces: {{ expression }}. AngularJS expressions binds data to HTML the same way as the ng-bind directive. AngularJS will "output" data exactly where the expression is written. AngularJS expressions are much like JavaScript expressions: They can contain literals, operators, and variables.
AngularJS Expressions by Example
<!DOCTYPE html>
<html>
<body>
<div ng-app="">
<p>My first expression: {{ 5 + 5 }}</p>
</div>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script>
</body>
</html>
AngularJS Expressions by Example
<!DOCTYPE html>
<html>
<body>
<div ng-app="">
<p>My first expression: {{ 5 + 5 }}</p>
</div>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script>
</body>
</html>