First of all, you need to define an array with your elements and a value bindfor one variable, for example ng-model="number".
input, number (digest cicle ), , , index words .
<div id="word">{{words[number]}}</div>
function MyCtrl($scope) {
$scope.number=1;
$scope.words= ['','One','Two','Three','Four','Five','Six'];
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app>
<div ng-controller="MyCtrl">
<input type="text" ng-model="number" />
<div id="word">{{words[number]}}</div>
</div>
</div>
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