后置递增运算符（JS）

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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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    <title>后置递增运算符</title>
    <script>var num = 10;
        num++; // num = num + 1    ++num;
        console.log(num);  //11
        // 1. 前置自增和后置自增如果单独使用 效果是一样的
        // 2. 后置自增 口诀：先返回原值 后自加1 
        var age = 10;
        console.log(age++ + 10);  //20
        console.log(age);   //11</script>
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