Add two Numbers in AngularJS

Solution 1 – Using Double Negation

Very beautiful hack. Code as…

<div ng-app="">
    <h3>Using Double Negation</h3>

    <p>First Number:
        <input type="text" ng-model="a" />
    </p>
    <p>Second Number:
        <input type="text" ng-model="b" />
    </p>
    <p>Sum: {{ a -- b }}</p>
</div>

Solution 2 – Using HTML5 Input Type Number

<div ng-app="">
    <h3>Using Input Type Number</h3>

    <p>First Number:
        <input type="number" ng-model="x" />
    </p>
    <p>Second Number:
        <input type="number" ng-model="y" />
    </p>
    <p>Sum: {{ x + y }}</p>
</div>