Getting the radio input change in controller

ionic-v1
1

i’m using ionic v1,angularjs i want to display the selected value when choosing a radio button and display its value in the controller.

<ion-view>
    <div ng-include src="'templates/hearderWithoutBack.html'"></div>



    <ion-content>
        <div class="content padding has-header">
                <div class="responsive-sm">

                    <h1 class="text-center custom-h1">Payer en utilisant</h1>
                    <div class="list">

                        <label class="item item-radio">
                            <input type="radio" name="formule"  value="1" ng-model="changedVal" value="pass" ng-click="getVal()">
                            <div class="radio-content">
                                <div class="item-content">
                                    <i><img src="img/edinar.png"></i>
                                    eDINAR
                                </div>
                                <i class="radio-icon ion-checkmark"></i>
                            </div>
                        </label>

                        <label class="item item-radio">
                            <input type="radio" name="formule" value="2" ng-model="changedVal" value="pass" ng-click="getVal()">
                            <div class="radio-content">
                                <div class="item-content">
                                    <i><img src="img/universl.png"></i>
                                    <i class="radio-icon ion-checkmark"></i>
                                    Universel
                                </div>

                            </div>
                        </label>

                        <label class="item item-radio">
                            <input type="radio" name="formule" value="3" ng-model="changedVal" value="pass" ng-click="getVal()">
                            <div class="radio-content">

                                <div class="item-content">
                                    <i><img src="img/electron.png"></i>
                                    DinarPost via Electron
                                </div>
                                <i class="radio-icon ion-checkmark"></i>
                            </div>
                        </label>

                    </div>


                    <div class="footer" style="width: 100%;">
                        <div class="text-center">
                            <button class="button custom-button Payer">
                                Payer
                            </button>
                        </div>

                    </div>


                </div>
            </div>



    </ion-content>

</ion-view>