Solution: In memory counter with decrement

• ng-init
• ng-click

<script src="angular.min.js"></script>
<div ng-app>
    <div ng-init="counter = 0"></div>
    <button ng-click="counter = counter + 1">Increment</button>
    <button ng-click="counter = counter - 1">Decrement</button>
    {{counter}}
</div>