01.两个赋值互换 

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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
      var num1,num2,temp;
      num1=2;
      num2=1;
      temp=num1;
      num1=num2;
      num2=temp;
    //   相当于把两个赋值互换了一下
     console.log(num1);//1
     console.log(num2);//2
    
    </script>
</body>
</html>

 

posted @ 2020-03-09 20:08  竹石君  阅读(213)  评论(0)  编辑  收藏  举报