交换两个变量的值

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    <title>交换两个变量的值</title>
    <script>// 交换两个变量
        var num1 = 'pink';
        var num2 = 'yellow';
        var temp;
        temp = num1;
        num1 = num2;
        num2 = temp;
        console.log(num1, num2);</script>
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