实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
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<!DOCTYPE html>
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<html>
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    <head>
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        <title>
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            Add Example 1
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        </title>
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        <script type="text/javascript">
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            var result1 = 5 + 5; //two numbers
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            alert(result1); //10
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            var result2 = 5 + "5"; //a number and a string
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            alert(result2); //"55"
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        </script>
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    </head>
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    <body>
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    </body>
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</html>