angularjs 求兩變數之和

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<img src="https://angularjs.org/img/AngularJS-large.png" height="50px" weight="50px"/><h3>Sum of two Numbers using AngularJS</h3><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>     <h3>Using Input Type Number</h3>    <p>First Number:        <input type="number" ng-model="c" />    </p>    <p>Second Number:        <input type="number" ng-model="d" />    </p>    <p>Sum: {{ c + d }}</p></div>

　　

angularjs 求兩變數之和